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 Which rail for my Colt 6920?
FNG308  [Member]
1/19/2008 6:42:49 AM
Which one to look at and why? I also would like to add a different buttstock, was at the gunstore and got to play with an LMT with it's SOPMOD stock, now I know why AR guys add these extras it felt like a dream compared to the basic M4 stock. thanks
CWS1911  [Life Member]
1/19/2008 6:52:38 AM
I have a Troy MRF-C Rail

One continious rail on top.

Got it from Denny's/GTS

Good Luck
shadowcop  [Member]
1/19/2008 7:31:49 AM
I ordered a DD Lite for my 11.5. Light weight, continuous top rail, secure, and looks damn good.
TexFive-O  [Member]
1/19/2008 7:39:19 AM
I just put the Larue 7.0 rails on my Colt LE6920. Customer service was impeccable, the rails are light weight and look awesome. Even says "Live free or die" on it . They offer package deals such the rails w/ rail covers or VFG. You can order it all online and they'll get them to you fast...
bryan0928  [Member]
1/19/2008 8:20:56 AM
DD lite rail 7.0. They advertise as lightest, strongest, and best made in the biz and I believe they are. I just put the afore mentioned rail on my carbine and I think I'm in love. I do not, however, have expierience with other rail systems, but I love the one I have and I think it would kick ass on a 6920. For my next build, I am going to look into Larue and depending on what I find it will be it or the DD lite rail again.
redfisher  [Team Member]
1/19/2008 9:22:13 AM

Originally Posted By FNG308:
Which one to look at and why? I also would like to add a different butt-stock, was at the gunstore and got to play with an LMT with it's SOPMOD stock, now I know why AR guys add these extras it felt like a dream compared to the basic M4 stock. thanks


You didn't cut corners on the rifle, and should not on the rail and butt-stock

Top quality rail options:

LaRue 7.0
Daniel Defense- 7" in either Lite, or standard, or Omega
KAC RAS - my personal favorite - no need to remove FSB, rock solid, and is in .mil use
Troy or Samson


'Best' Butt-stock options:

LMT SOPMOD - personal favorite- comfortable, utilitarian, and is in military use.
Magpul- CTR - many positive reviews here from knowledgeable shooters
Magpul - UBR - see above
Vltor - standard, or new model (forget the designation)


There is a complete section of this board devoted to reviews and discussion on both rails or replacement stocks.

Replacement rails thread

and

Best replacement stock- discussion

Look, listen and see what those in your situation have chosen and why

FiveseveNDoubletaP  [Member]
1/19/2008 3:56:52 PM
I went with the KAC M4 RAS for the rail and a Magpul CTR for the stock on my Colt 6920.

The KAC M4 RAS has a record of durability/reliability with GI's and that's the reason I went with it.If it stands up to their abuse,then it's GTG for me.

The Magpul CTR is as light as the M4 stock,has an integral swivel mount for the sling,accepts a rubber buttpad and it cost under $100.I probaly would have went with the SOPMOD if it wasn't double the price and heavier.
Belmont31R  [Team Member]
1/19/2008 4:17:25 PM
Without a doubt the Knights M4 RAS. Ive used Knights rails for quite a while both on my personal guns and ones Ive taken into combat, and they are great. Ive also used LaRue rails, and they are awesome as well but weigh more, harder to install, and dont allow you as good of access under the rail once its on.


I also have both a SOPMOD and CTR stock. I prefer the sopmod but they are also twice as much. You cant go wrong with either one...

zgxtreme  [Member]
1/19/2008 5:15:56 PM
I agree with the others on the KAC RAS. A Colt and the KAC RAS seem to just be made for each other. Both are simple, solid, reliable and dependable when you're life counts on it. I had a KAC RAS on my FN M16A4 and now have one on my Colt 6933 now that I am in L.E. I will most likely not use another rail system again... unless MAYBE it is a KAC FF system, still KAC quality and simplicity though. Search the EE and you can find new RAS systems for very reasonable prices! I did just last week!

As per the stock, again I agree with the prior posters. I am waiting for DSG Arms to get mil-spec CTRs in black so I can get one for my Commando and maybe a second for when I get a 6920. Magpul is a great company to support and as a bonus you get an outstanding and well engineered product!
Belmont31R  [Team Member]
1/19/2008 10:44:52 PM
Also just wanted to mention that if you keep an eye on the EE you can get RAS's for 200 or less. Aside from the first couple Ive bought I have paid more than 200 for the last couple sets Ive bought, and they were in good or better condition (excellent compared to the ones Ive used in the military). You wont find a better made rail system for that money.

The last one I got was a trade for a LaRue SPR mount for a RAS with SAS bottom end...
legendchaser  [Member]
1/19/2008 11:56:46 PM
One more vote for the RAS. I bought a 6920 yesterday with the KAC RAS installed. It fits the 6920 well and has just the right feel for me.
FChen17213  [Member]
1/20/2008 6:24:02 AM
I have Knights RAS, Daniel Defense, LaRue, and Surefire. My vote definitely goes to LaRue and Daniel Defense. You certainly didn't skimp on your rifle so why skimp on the quad rail? The Daniel Defense Lite Rail is rock solid and free float. It's truly an excellent excellent product. So is the LaRue. The general concensus is that these two rail systems are the best. I know lots of people like the KAC because our GIs are using them. However, keep this in mind. Just because the Gov't issues them does NOT mean that they're the best. I honestly doubt too many people can say with a straight face that the MaTech BUIS is the best BUIS out there. The Troy is definitely better in many aspects. The KAC does seem to be well built and much easier to install than the other two. However, I feel that the DD Lite Rail and LaRue are more solid and my accessories fit on them more solidly. You can't go wrong with LaRue or DD.
Belmont31R  [Team Member]
1/20/2008 12:40:24 PM

Originally Posted By FChen17213:
I have Knights RAS, Daniel Defense, LaRue, and Surefire. My vote definitely goes to LaRue and Daniel Defense. You certainly didn't skimp on your rifle so why skimp on the quad rail? The Daniel Defense Lite Rail is rock solid and free float. It's truly an excellent excellent product. So is the LaRue. The general concensus is that these two rail systems are the best. I know lots of people like the KAC because our GIs are using them. However, keep this in mind. Just because the Gov't issues them does NOT mean that they're the best. I honestly doubt too many people can say with a straight face that the MaTech BUIS is the best BUIS out there. The Troy is definitely better in many aspects. The KAC does seem to be well built and much easier to install than the other two. However, I feel that the DD Lite Rail and LaRue are more solid and my accessories fit on them more solidly. You can't go wrong with LaRue or DD.



You sacrifice weight savings by going with a free floated rail. The RAS will do what 99.9% of what the people on this board will be doing with it. Knights are correctly manufactured so I dont know why your accessories would fit better on other rails If you are using a clamp on or screw on mount it should be just as good as any other..
Alpha-Romeo3  [Team Member]
1/20/2008 1:53:02 PM
There are different rail types and the main difference are non free floating and free floating, for short ranges the non free floating type works fine and the free floating type slightly increases the accuracy at long ranges.

Here are some of the good rails:

Non free floating - drop in - they install just like a standard handguards without removing the delta ring:

KAC M4 RAS
Troy MRF DI
Samson STAR-DI


Free floating - removing the delta ring not required:

Daniel Defense Omega Rail


Free floating - removal of delta ring required:

Troy MRF
Samson STAR


Free floating - removal of barrel nut required:

LaRue
Daniel Defense M4 and Lite Rails
KAC RAS


If you wanted the most rugged rails for extreme use I would recommend the LaRue and Daniel Defense Lite Rail series because they have an extra locking design that would prevent the rails from getting loose.

I've got the LaRue, KAC M4 RAS and Samson rails.


Buttstocks:

LMT SOPMOD
Magpul CTR
Magpul UBR - pre-production models only, production models will be released soon
Vltor Modstock, Club Foot and EMOD

I've got the CTR which is lightweight, easy to install like the standard M4 stock and very solid when locked like a solid stock.

I also got the Vltor Carbine Modstock, Club Foot Modstock and EMOD models, the Modstocks either fits more snug than the standard M4 stocks or some have some movement like the M4 stocks, the EMOD is their newest model longer than the LMT SOPMOD stock and have detachable battery/ accessory compartments plus an extra compartment at the club foot area at the bottom rear of the stock, the EMOD fits tighter than the Modstocks.

The Vltor Club Foot and EMOD have the club foot design which is held by the support hand to steady the rifle for precision shots.

For more info on details and other brands go to redfisher's tacked thread links.
ClarenceDammit  [Team Member]
1/20/2008 3:17:46 PM

Originally Posted By Belmont31R:

Originally Posted By FChen17213:
I have Knights RAS, Daniel Defense, LaRue, and Surefire. My vote definitely goes to LaRue and Daniel Defense. You certainly didn't skimp on your rifle so why skimp on the quad rail? The Daniel Defense Lite Rail is rock solid and free float. It's truly an excellent excellent product. So is the LaRue. The general concensus is that these two rail systems are the best. I know lots of people like the KAC because our GIs are using them. However, keep this in mind. Just because the Gov't issues them does NOT mean that they're the best. I honestly doubt too many people can say with a straight face that the MaTech BUIS is the best BUIS out there. The Troy is definitely better in many aspects. The KAC does seem to be well built and much easier to install than the other two. However, I feel that the DD Lite Rail and LaRue are more solid and my accessories fit on them more solidly. You can't go wrong with LaRue or DD.



You sacrifice weight savings by going with a free floated rail. The RAS will do what 99.9% of what the people on this board will be doing with it. Knights are correctly manufactured so I dont know why your accessories would fit better on other rails If you are using a clamp on or screw on mount it should be just as good as any other..


According to the tacked thread:

LaRue 7.0 - 11.5oz
KAC M4 RAS-8.8 (handguard)+2.5(standard nut that remains)2.5 = 11.3 oz

The LaRue website says .742 lb or 11.9 oz for the 7.0; either way, the difference is less than an ounce.
wgjhsafT  [Team Member]
1/21/2008 12:42:30 AM
Here's a 6920 with the Troy MFR-C rails.



Another configuration of the same rifle:



airgunner  [Member]
1/21/2008 8:13:27 AM
I'm going to guess by your post count that you do not have the tools\experience to remove and reinstall your own barrel? If that is true, then a 1-piece FF rail is not your best option. If you are going to go 2-piece then there is only one option IMO... the DD Omega rail. It has everything you want in a rail. Rock solid, FF, light weight, slim profile, continuous rail look, easy to install, no modification of the weapon needed and a very reasonable price compared to it's competition. Again, IMO, it blows away every other 2-piece rail out there and I don't think it even gives up much to the 1-piece designs if you weight all of the pros and cons.