AR15.Com Archives
 AR 45 ACP Upper
ppcblaster  [Member]
2/14/2011 1:36:58 PM
Can someone please explain the difference between the Ron Williams upper and

Olympic Arms upper design and operation and the pro's and con's of each?

Is one better than the other?

Thank you
RDTCU  [Team Member]
2/14/2011 1:44:43 PM
Oly:
Blowback

RW:
Direct Impingement (gas operated)


Each has it's own perks, but I built my own gas-op .45 AR.

The DI system will have less felt recoil and will cause less wear on the rest of the gun, but it may be more sensitive to weak ammo. You can usually fix this with a no-weight buffer, but it depends on the ammo...
TANGOCHASER  [Team Member]
2/15/2011 12:47:29 AM
Biggest advantage of the Ron Williams DI upper is less fouling. The Oly blowback uppers leave the bolt covered in carbon from the blowback operation. The Oly set up is very reliable but needs more cleaning.

I don't have first hand experience with the RW upper but I've never heard of any being returned because they wouldn't run. Gonna try one myself some day.

The RW also uses standard upper receivers while the Oly mounts the ejector in the upper receiver and it requires drilling 3 holes to use an other than Oly upper receiver.
bushwack  [Team Member]
2/15/2011 2:52:36 AM
Also the DI setup is much lighter than the Oly blowback.
SpecOps-13  [Team Member]
2/15/2011 9:20:45 AM
I love my RMW Upper. It's a 10.5" with a 5.5" permanent muzzle device.
Once he has standard magazines available, there will be no competition
as far as I'm concerned. Accuracy is nothing short of amazing. This past
Friday, I hit a swinging steel target at 25 yards, 5 out of 6 times, rapid fire.

And consistently hit kill zone at 50 yards with all kinds of crappy and very good
ammo.. Short of some of the elite 22's that I get to test, This is by far my favorite
upper...

I hear bad things about the Oly and the plastic magazines they use.

BTW, I've have had good luck converting PPS-43 Mags for use with Ron's block and
converted Stainless Steel 20 round AR Mags. He uses Grease Gun Mags with a block
with outstanding luck too...

Dave / Spec
ronaldmwilliams  [Team Member]
2/15/2011 9:45:49 AM
I think everyone here sums it up. The first real item I feel is the use of std parts. No special bolts/carriers. No heavy carriers/ springs/buffers. The reduced weight/recoil impulse is a close second.
If I can get the mags I am working on set up, everything will fall into place.
Not going at this like oly did with their plastic mags. Even the blowbacks will benifit.
crazytuco  [Member]
3/4/2011 12:08:27 PM
Will they work with Oly's ejector rod running across the top of the magwell when the upper and lower are closed together? A standard AR mag won't work in an Oly, as I'm sure you know.

And any ETA on your mags yet?
vsotok10  [Member]
3/4/2011 1:40:31 PM
I cant speak for Oly but Ron's service is outstanding ! Open to feedback and quick with a response gets my vote.
SpecOps-13  [Team Member]
3/4/2011 5:35:06 PM
All I can say is Ron was working on this the last time I spoke with him.
Believe me he's ready to have the magazines available, it's OP that are
the hold up... If Ron sees this I'm sure he'll answer.
SeanC  [Team Member]
3/4/2011 10:57:36 PM
Does RMW have a website, price list, or options available listed anywhere on the web? Seen posts and I'm intrigued to say the least about his uppers.
duncan  [Team Member]
3/5/2011 2:42:29 AM
I have multiple PCCs from Olympic Arms. They are the largest AR-15 manufacturer west of the Mississippi.

They have been manufacturing 9mm, 40SW, 10mm, and 45 ACP AR-15s longer than any other manufacturer.

They have their own full-sized polymer PCC magazines - no one esle does.

My Oly PCCs recoil about 60% of 223's felt recoil. I have an Oly 9mm and 10mm carbines and a 45 acp AR pistol.

My 10mm does have some thump to it but those are quite hot 200 grain loads for shooting at 100 yards.

I had an 14 year old girl shooting my 45 ACP AR pistol with a church group a few weeks ago.

Nothing wrong with blowback - many guns have been using that technology for many years.

Here is a new 45 acp carbine for $925:

http://www.gunsamerica.com/Search.htm?T=olympic+arms



Meche_03  [Team Member]
3/5/2011 3:41:49 AM
To muddy the water abit, has anyone used the new Oly plastic mags to feed one of Ron's DI uppers? If so did it function correctly?
SpecOps-13  [Team Member]
3/5/2011 8:43:45 AM
Rons Site: http://www.rmwxtreme.com/

Oly Mags,,,, Not with Rons Upper. I've heard some negatives about using Oly Mags with Oly
Uppers too. Cracks....

Ron promised to have some info on magazines posted here over the weekend if he can get a
few minutes.. He's working on getting a new steel magazine that will benifit everyone with 45's.

Spec
doc_Zox  [Team Member]
3/5/2011 8:58:09 AM
Hey Ron,

I will trade you a website design for an upper!

dZ


ronaldmwilliams  [Team Member]
3/5/2011 9:41:41 AM
I am trying to get some mags made. I have a design but getting someone to build them is a diferent story. Waiting to hear from someone right now. More info as i get it.
The oly mag wont work. Toooooo much plastic. To help avoid cracking feed lips & or mag oly beefed them up. This is why they look like a 2x4 sticking out of your lower but tangos post says it all. All the hot gases associated with blowback are 'cooking" the mags feed lips. As that plastic tempers they will fail. Just give it time. Hopefully oly has a lifetime replacement on the mags
ronaldmwilliams  [Team Member]
3/5/2011 9:42:54 AM
Originally Posted By doc_Zox:
Hey Ron,

I will trade you a website design for an upper!

dZ




I am a one man shop so it was the best I could do time permiting. Let me think about it.
shindawia6  [Member]
3/5/2011 2:29:45 PM
how much does his upper's cost?
ARMOR  [Member]
3/5/2011 3:42:08 PM
Mad Machinest is making me a custom D.I. 45 with a cnc gunsmithing lower that takes GG mags
. This is the sight I found him on.
http://www.cncguns.com/forum/index.php?board=19.0
Meche_03  [Team Member]
3/6/2011 3:26:01 AM
Ron,

are you saying the new oly mags can not work with your upper or they just won't last long? If they won't work at all then that solves alot of peoples problems. If they will work but they will just have a short life, I might do that knowing its short lived. I'm still trying to get a DI upper working for me. It's not your fault as far as I can tell, I have not had time to really chase the problem down. Working 16 hours a day, being away from home for 3 months.....being sick for over a week...... I know it worked when it was shipped, because you test em all.
Johnny_C  [Member]
3/6/2011 8:40:45 AM

I don't have any intention of buying
the new Oly mags, because I have
been using slightly modified Sten
mags for about 10 years with zero
malfunctions in my Oly 9mm's.

Some of the comments above illude
that Oly's plastic mags are all that is
available for their products and that's
not true. The Sten mags are plentiful,
cheap & work great. I have some
issues with Oly's customer service,
but both of my Oly's run 100%.
I have a 16" rifle & built a 7" pistol
last year, and love them both.

I am not knocking Ron's product, because
he has a great following here, for apparent
good reasons.

FYI...

John
SpecOps-13  [Team Member]
3/6/2011 8:51:55 AM
Ron has talked with me about what would be necessary to get an Oly mag to work.
So I'll try to relay that info as closely as I can. The magazine would have to be modified
so that the gas bolt lugs can ride over the magazine and follower and pick up a round.
Ron feels that this mod may weaken the feed lips to a point, causing failure in short order.
We've heard of the magazines cracking after only a few rounds without mod. This may be
isolated incidents or may be from a general weakness. The idea of working or failing is
something that's dependent on the material that's actually used in their construction.
Some rumors point to MagPul making the Oly. That would be a good thing. We just don't
know. Neither Ron nor I are willing to blow $50.00 for a magazine that may fail nearly
immediately.

Dave / Spec
ronaldmwilliams  [Team Member]
3/7/2011 9:34:55 AM
Originally Posted By Meche_03:
Ron,

are you saying the new oly mags can not work with your upper or they just won't last long? If they won't work at all then that solves alot of peoples problems. If they will work but they will just have a short life, I might do that knowing its short lived. I'm still trying to get a DI upper working for me. It's not your fault as far as I can tell, I have not had time to really chase the problem down. Working 16 hours a day, being away from home for 3 months.....being sick for over a week...... I know it worked when it was shipped, because you test em all.


They wont work. The plastic lips do not allow the bolt/carrier to pass.
Are you the one running the MGI GG magwell?
JIMBEAM  [Team Member]
3/7/2011 12:44:40 PM
Originally Posted By SpecOps-13:
Rons Site: http://www.rmwxtreme.com/

Oly Mags,,,, Not with Rons Upper. I've heard some negatives about using Oly Mags with Oly
Uppers too. Cracks....

Ron promised to have some info on magazines posted here over the weekend if he can get a
few minutes.. He's working on getting a new steel magazine that will benifit everyone with 45's.

Spec


Ppsh?
vermont2nd  [Life Member]
3/7/2011 12:49:16 PM
Originally Posted By JIMBEAM:
Originally Posted By SpecOps-13:
Rons Site: http://www.rmwxtreme.com/

Oly Mags,,,, Not with Rons Upper. I've heard some negatives about using Oly Mags with Oly
Uppers too. Cracks....

Ron promised to have some info on magazines posted here over the weekend if he can get a
few minutes.. He's working on getting a new steel magazine that will benifit everyone with 45's.

Spec


Ppsh?


Pps-43 mags have been in use for awhile with Ron's uppers.

Here's my new beauty:


7.5" barrel; now if I could just get my sights delivered, I'd be able to enjoy it.
JIMBEAM  [Team Member]
3/7/2011 4:28:22 PM
Originally Posted By vermont2nd:
Originally Posted By JIMBEAM:
Originally Posted By SpecOps-13:
Rons Site: http://www.rmwxtreme.com/

Oly Mags,,,, Not with Rons Upper. I've heard some negatives about using Oly Mags with Oly
Uppers too. Cracks....

Ron promised to have some info on magazines posted here over the weekend if he can get a
few minutes.. He's working on getting a new steel magazine that will benifit everyone with 45's.

Spec


Ppsh?


Pps-43 mags have been in use for awhile with Ron's uppers.

Here's my new beauty:

http://www.ar15.com/media/viewFile.html?i=27229

7.5" barrel; now if I could just get my sights delivered, I'd be able to enjoy it.


I have one too but it is 7.62x25mm. .45 should work too.
Meche_03  [Team Member]
3/7/2011 10:14:26 PM
Originally Posted By ronaldmwilliams:
Originally Posted By Meche_03:
Ron,

are you saying the new oly mags can not work with your upper or they just won't last long? If they won't work at all then that solves alot of peoples problems. If they will work but they will just have a short life, I might do that knowing its short lived. I'm still trying to get a DI upper working for me. It's not your fault as far as I can tell, I have not had time to really chase the problem down. Working 16 hours a day, being away from home for 3 months.....being sick for over a week...... I know it worked when it was shipped, because you test em all.


They wont work. The plastic lips do not allow the bolt/carrier to pass.
Are you the one running the MGI GG magwell?


I'm trying to run a modified GG mag in a standard lower. I'm getting one shot and short stroke, repeat. I have a carbine buffer and spring in a collapsible stock with the mass removed from the buffer to see if changed the cycle and still short strokes. I need to catch the cycle on high frame rate camera but I haven't gotten around to it.
SpecOps-13  [Team Member]
3/8/2011 8:55:23 AM
I've got the same, buffer with no weights and also used the JP Spring for the hammer.
I get full cycle with White Box Ammo but I'm using the RMW Upper with a block and
modified PPS-43 Magazines or modified stainless steel AR Mags. Both feed from the rear.
If Ron can get these mags done, it will be a blessing in simplicity to just buy mags that work.

Dave
Meche_03  [Team Member]
3/8/2011 9:00:16 AM
I would go with a modified ppsh mag if I could just borrow one for a while to see if it would fix the problem. Then if it corrected the short stroke I'd purchase a mag block and mag. I probably will get a Tok upper next and then the mag block and mag would work for it too. I just don't want to drop almost 200 dollars on a mag adapter and mag to see if thats my problem right now.
ronaldmwilliams  [Team Member]
3/8/2011 9:43:31 AM
Originally Posted By Meche_03:
Originally Posted By ronaldmwilliams:
Originally Posted By Meche_03:
Ron,

are you saying the new oly mags can not work with your upper or they just won't last long? If they won't work at all then that solves alot of peoples problems. If they will work but they will just have a short life, I might do that knowing its short lived. I'm still trying to get a DI upper working for me. It's not your fault as far as I can tell, I have not had time to really chase the problem down. Working 16 hours a day, being away from home for 3 months.....being sick for over a week...... I know it worked when it was shipped, because you test em all.


They wont work. The plastic lips do not allow the bolt/carrier to pass.
Are you the one running the MGI GG magwell?


I'm trying to run a modified GG mag in a standard lower. I'm getting one shot and short stroke, repeat. I have a carbine buffer and spring in a collapsible stock with the mass removed from the buffer to see if changed the cycle and still short strokes. I need to catch the cycle on high frame rate camera but I haven't gotten around to it.


What ammo are you running? Test the upper with one round loaded, insert a std AR15 mag. Shoot & see if the bolt locks back. LMK
Meche_03  [Team Member]
3/8/2011 10:25:17 PM
I''ve tried winchester white box, remington white/green box, some privi and some hand loads. All one and short, with and without mass in the buffer. Will try a normal ar mag, sapposed to rain all week. Should I put the mass back in the buffer or try it without first?
ronaldmwilliams  [Team Member]
3/9/2011 9:06:48 AM
Originally Posted By Meche_03:
I''ve tried winchester white box, remington white/green box, some privi and some hand loads. All one and short, with and without mass in the buffer. Will try a normal ar mag, sapposed to rain all week. Should I put the mass back in the buffer or try it without first?


Try as is & let me know.
NWRed  [Team Member]
3/10/2011 2:37:13 AM
Im running a Oly upper with a CavArms lower with a Hahn block and GG mags ;) I dont see myself ever using one of Olys mags.
JIMBEAM  [Team Member]
3/10/2011 8:42:08 AM
Are the DI .45 uppers up and running?

SpecOps-13  [Team Member]
3/10/2011 7:00:30 PM
Yes, as far as I know... Mine works great, even my way FA. The biggest problem right now is modifying mags
to work with them. Ron has Grease Gun Mags but he's trying hard to have standard off the shelf mags made
for 30 rounds.
.
I love my DI-45, it's a Keeper Forever...

RMW, DI-45 Video: http://www.youtube.com/watch?v=U3XIL7Bv36I

Dave

PS: Modded 20 round AR mags will work for 6 rounds OF 45, PPS-43 Mags modded for more...
duncan  [Team Member]
3/11/2011 4:02:38 AM
The best practice is to NOT mix the different systems.

If you like the DI concept, Ron is your man. He even is doing a 7.62 Tok upper - nice. Could shoot one of those Tok C&R pistols and your AR-15.

If you want to run a multiple caliber PCC, then Olympic is your best choice from 9mm, 40SW, 10mm to 45 ACP. There are other too but not offering the whole pie.

I've been testing some Oly polymer 9mm and 45 ACP mag in the freezing cold and in the rain and dropped them at least a dozen times each with about 1,000 round through each. No cracked lips. No issues. As most of us know, these are Black Dog manufactured. Sure I have a boatload of Sten mags - but really - they look like an elephant's tail in our AR-15s. Off look. These are full-sized.
Meche_03  [Team Member]
3/26/2011 12:28:55 AM
Originally Posted By ronaldmwilliams:
Originally Posted By Meche_03:
I''ve tried winchester white box, remington white/green box, some privi and some hand loads. All one and short, with and without mass in the buffer. Will try a normal ar mag, sapposed to rain all week. Should I put the mass back in the buffer or try it without first?


Try as is & let me know.


I got lost at work for a while, again. It's hard to trouble shoot a firearm when you're gone for up to 3 months at a time.

I put a normal AR magazine in the lower. Tested the bolt hold back which worked. Used carbine buffer without mass and carbine spring. Fed the upper one round at a time. 5 rounds of winchester white box 230gr? fmj, bolt never stayed back. 5 rounds of remington white/green box 230gr jhp, bolt never stayed back.

I then put the normal AR magazine in a 2nd lower that had just fired 120 rounds of .223 with no feed, ejection or bolt hold back problems. Used carbine buffer with mass and carbine spring. Fed the 45acp upper one round at a time. 5 rounds of winchester white box 230gr? fmj, bolt never stayed back. 5 rounds of remington white/green box 230gr jhp, bolt never stayed back.

The upper fires well and ejects consistantly with all the rounds falling in a small pile.
Mad-Machinist  [Member]
3/26/2011 3:59:16 PM
Trim about 3 coils off the carbine recoil spring and try again, with a no weight buffer it usually takes 3 to 5 coils to make a DI 45 run.....
Meche_03  [Team Member]
3/26/2011 5:19:17 PM
I have tried no mass inside buffer and normal carbine buffer mass, both don't function correctly. Mr Williams mentioned there may be a break in period but I shouldn't have to modify the equipment, though thats been a while ago.

I picked up my brass and noticed all of it has a black soot stain about 3/8" wide at the case mouth and about 3/8" back down the case in a parabola. The rim of the case is black at the same location. Is it possible I'm getting blowby or that the case is not staying in battery long enough? I don't know, I haven't seen other peoples DI spent brass.
NWRed  [Team Member]
3/26/2011 5:32:55 PM
Finally got my Cav/Oly together and off to test it yesterday. Feeding from brand new Keepshooting.com GG mags the bullets would get stuffed up into the top of the Oly barrel extension at about a 45 degree angle and get gouged on the face of the chamber, sometimes the projectile, sometimes the case. After 100 rounds or so it started running a lil better and I could fire 2 or 3 shots without jamming, particularly if I tilted the rifle at about a 45 degreee so I could see the ejection port. This was a Oly pistol barrel blank I had the chamber cut in, so the edge of the chamber was sharp. Not sure if thats normal or if there's some kind of "deburring" that normally gets done with a factory built rifle. I plan to buy some steel cased ammo for the next trial, hopefully that'll cut down on gouged cases and stoppages.

I'm going to clean up my welds some more and put a finish on the barrel/welded extension once it runs right.
ronaldmwilliams  [Team Member]
3/27/2011 11:57:42 AM
Originally Posted By Mad-Machinist:
Trim about 3 coils off the carbine recoil spring and try again, with a no weight buffer it usually takes 3 to 5 coils to make a DI 45 run.....


I have never had to do this. Light buffer for breakin with some uppers but never cut the spring.

Originally Posted By Meche_03:
I have tried no mass inside buffer and normal carbine buffer mass, both don't function correctly. Mr Williams mentioned there may be a break in period but I shouldn't have to modify the equipment, though thats been a while ago.

I picked up my brass and noticed all of it has a black soot stain about 3/8" wide at the case mouth and about 3/8" back down the case in a parabola. The rim of the case is black at the same location. Is it possible I'm getting blowby or that the case is not staying in battery long enough? I don't know, I haven't seen other peoples DI spent brass.

Some ammo will do this. It does not have enough power to seal the chamber mouth compleatly.
How many rounds through the upper? I may have you send it back so i can see were the issue lies. Sometimes it can be dificult becase they run for me but it may be the best way to get this resolved.

Mad-Machinist  [Member]
3/27/2011 8:09:46 PM
I run a smaller gas port if I'm not mistaken.....and 3 to 5 coils off the recoil spring hasn't affected reliability.............I'm up over 10,000 rounds through my personal AR45 and it just runs better every time I shoot it.

And the round catching at the angle it is can often be aleviated by tweaking the feed lips on the mag.......
Meche_03  [Team Member]
3/27/2011 11:45:14 PM
Originally Posted By ronaldmwilliams:
Originally Posted By Mad-Machinist:
Trim about 3 coils off the carbine recoil spring and try again, with a no weight buffer it usually takes 3 to 5 coils to make a DI 45 run.....


I have never had to do this. Light buffer for breakin with some uppers but never cut the spring.

Originally Posted By Meche_03:
I have tried no mass inside buffer and normal carbine buffer mass, both don't function correctly. Mr Williams mentioned there may be a break in period but I shouldn't have to modify the equipment, though thats been a while ago.

I picked up my brass and noticed all of it has a black soot stain about 3/8" wide at the case mouth and about 3/8" back down the case in a parabola. The rim of the case is black at the same location. Is it possible I'm getting blowby or that the case is not staying in battery long enough? I don't know, I haven't seen other peoples DI spent brass.

Some ammo will do this. It does not have enough power to seal the chamber mouth compleatly.
How many rounds through the upper? I may have you send it back so i can see were the issue lies. Sometimes it can be dificult becase they run for me but it may be the best way to get this resolved.



I have no problems with Mr Ron Williams quality of work or communication. Just want to state this for others reading. He has tried to help me everytime I have contacted him. I am the weak link in communication.

The upper probably has 60+ rounds through it, most without mass in the buffer. It takes awhile when you have a single shot rifle I was hoping to borrow a high speed camera from a buddy out at the explosives range to record the bolt in action but I haven't gotten out there yet. When I get some time I will try a few more rounds through it before I send it back to you Mr. Williams. I know your busy and if I can fix it without taking up your shop time I feel it would safe you some head aches.

I may try a temporary removal of 4 links from the buffer spring to see if it "fixes" the problem. I will also try to find a good sized pipe cleaner and clean out the gas tube, maybe I got some junk up in there? Easy trouble shooting first.

ronaldmwilliams  [Team Member]
3/28/2011 12:05:00 PM
Originally Posted By Meche_03:
Originally Posted By ronaldmwilliams:
Originally Posted By Mad-Machinist:
Trim about 3 coils off the carbine recoil spring and try again, with a no weight buffer it usually takes 3 to 5 coils to make a DI 45 run.....


I have never had to do this. Light buffer for breakin with some uppers but never cut the spring.

Originally Posted By Meche_03:
I have tried no mass inside buffer and normal carbine buffer mass, both don't function correctly. Mr Williams mentioned there may be a break in period but I shouldn't have to modify the equipment, though thats been a while ago.

I picked up my brass and noticed all of it has a black soot stain about 3/8" wide at the case mouth and about 3/8" back down the case in a parabola. The rim of the case is black at the same location. Is it possible I'm getting blowby or that the case is not staying in battery long enough? I don't know, I haven't seen other peoples DI spent brass.

Some ammo will do this. It does not have enough power to seal the chamber mouth compleatly.
How many rounds through the upper? I may have you send it back so i can see were the issue lies. Sometimes it can be dificult becase they run for me but it may be the best way to get this resolved.



I have no problems with Mr Ron Williams quality of work or communication. Just want to state this for others reading. He has tried to help me everytime I have contacted him. I am the weak link in communication.

The upper probably has 60+ rounds through it, most without mass in the buffer. It takes awhile when you have a single shot rifle I was hoping to borrow a high speed camera from a buddy out at the explosives range to record the bolt in action but I haven't gotten out there yet. When I get some time I will try a few more rounds through it before I send it back to you Mr. Williams. I know your busy and if I can fix it without taking up your shop time I feel it would safe you some head aches.

I may try a temporary removal of 4 links from the buffer spring to see if it "fixes" the problem. I will also try to find a good sized pipe cleaner and clean out the gas tube, maybe I got some junk up in there? Easy trouble shooting first.


Another thought is if you have another upper/556 switch the bolt rings. Some of the rings on these 45 bolts are very tight. The "used' rings will go along way to helping the upper cycle. This is why the more you shoot them the better they get. i believe it is a good idea to put some brake cleaner down the gas tube to be sure of no debre. If you do cut the buffer spring please mark it so it does not get used in another upper.
Keep me posted.
Meche_03  [Team Member]
3/29/2011 7:09:48 AM
Good thing I just bought 3 cans of chlorine free brake cleaner to rebuild the rear brakes on my truck I'll try the gas rings also, for some reason I never thought of looking at them to check on their condition and miss-alignment. On the buffer spring, I was going to do the red neck version of shorting springs, ie, wire tie 4-5 turns together to shorten it. That way I can test a few shots and then return the spring to its full length. I'm just going to compress part of the spring so it is not acting on the buffer. You have built quite a number of these uppers and no one has mentioned having to cut turns off the spring to get them to work.
TANGOCHASER  [Team Member]
3/31/2011 10:30:26 AM
Try USGI grease gun mags. Cav Arms used to have a disclaimer stating not to use the Keep Shooting mags in their lowers. This may be the problem. You can get one from Gun Parts Corp out of New York.

If the rounds are nosing up before they even get to the chamber, it's more likely a mag issue.
NWRed  [Team Member]
3/31/2011 1:11:16 PM
Originally Posted By TANGOCHASER:
Try USGI grease gun mags. Cav Arms used to have a disclaimer stating not to use the Keep Shooting mags in their lowers. This may be the problem. You can get one from Gun Parts Corp out of New York.

If the rounds are nosing up before they even get to the chamber, it's more likely a mag issue.


The Cavarms/Keepshooting thing was in regard to the magwell dimensions. The GG slot in the magwell is slightly shorter and needs to be pushed towards the front 1/16" of an inch or so to allow the keepshooting mags to fit properly without binding. I've got everal of the Keepshooting mags, and none the USGI, so I'm working with what I have. I may look for a cheap USGI to give that a try.
Meche_03  [Team Member]
4/2/2011 3:16:13 PM
Well, I haven't gotten to go shot the upper yet to see if anything has changed. Last night when I took a break from school work, I'm working on my 4th-5th? engineering degree, I discovered something that may help.

I pulled a carbine buffer and spring from a Double Star stock set and layed it down next to the one that has been behind my 45acpDI upper. The double star carbine spring is 3/4"-1" shorter than the spring behind my 45DI upper. The buffer and spring behind the 45DI upper have worked with a double star 5.56 upper. The springs are all shorter than the rifle buffer springs I have but the Double Star is a bit shorter. So I'm going to swap them out instead of shortening one.

I can not remember but I think I got the other carbine stock set ups from Model1 or M&A, its been about 2 years since I got them. The Double Star buffer and spring look much nicer than the other ones.
Meche_03  [Team Member]
4/3/2011 10:21:25 PM
Well, still no range time but I did clean the upper. Bolt was very stiff in the carrier due to alot of carbon build up. I must have shot something that didn't burn very clean. Blew out the gas tube with brake cleaner and lots of stuff came out too. So I cleaned and scrubbed all the carbon off the bolt , rings and carrier. Lubed them back up with some gun oil. Every thing moves much nicer now.

Schedual looks like I may be pulling 16hr days for a week again so I don't know when I'll get to test the cleaned, lubed, upper with the shorter buffer spring.
Meche_03  [Team Member]
4/22/2011 10:48:24 PM
I'm not sure what fixed it, the really good cleaning or the new from factory shorter carbine buffer but it's alive. It's Alive Did 3-4 single shots with an AR mag in it and the bolt held back so I put my greasegun mag in and it ate up 20 rounds flawlessly. Just wanted to give anyone that was watching this thread the final out come.

I'll be asking Mr. Williams to build another upper now that I have proved in my last one.
ronaldmwilliams  [Team Member]
4/25/2011 9:38:30 AM
Glad to hear it. I test these but I do find that ocasionaly some have minor issues but they do get resolved.
Thanks again for the update.
SpecOps-13  [Team Member]
4/25/2011 4:35:07 PM
Ron,

Hope all is going well with you. My time has been pretty tied up since my 95 YO Mother
had a stroke on Valentine's Day. She's recovered quite well however, we are going to have
to put her in a home that will be able to give her care 24/7. She 180 out from our schedule
here at home now. Dragging us down trying to change our schedule to meet hers. Which
seems to change daily...

I need to shoot more and get out of my cage some too. No better stress relief in the world.
We should get together again sometime. Have you had any new updates on the 45 mags?
I'd also like to talk with you about your higher caliber uppers.... Are you developing anything
new? As you can se, I have lots of questions. Easier to talk than write so I'll shut up....

Take Care,
Dave