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Posted: 7/27/2013 8:17:04 AM EDT
Okay folks, I have a question that most of you can probably *correctly* answer off the cuff in your sleep, but I can't find the answer in the archives.  

I have a Colt 6933HB (Specialized Armament Warehouse) LE AR15 short barrel ( 11.5 inch ).  I want to install either a KAC RAS or RIS or perhaps a Daniel Defense Rail (Not Certain Which One) and I would like to use KAC Rail Covers, either way (if possible),

Can anyone provide a definitive answer as to which of the KAC or Daniel Defense Rail Systems will fit this 6933 Heavy Barrel setup?

I've read that not only the barrel diameter being a potential issue, but also the contour of the Delta Ring on this model.

Any help you can provide is greatly appreciated.

Thank you.
Link Posted: 7/27/2013 9:10:44 AM EDT
[#1]
It's the contour of the barrel at the delta ring, or more precisely, the barrel nut.  The M4 RAS has a small tab that locks in between the barrel and barrel nut, some very heavy barrels don't leave enough room for that tab. In that case, the RIS will work, as it locks onto the handguard cap at the front.

I've never seen the 6933HB or it's barrel, what is the contour like?  Can you post pics?

ETA:  I've never heard of that model from SAW, but if it's a cut down M4A1 SOCOM barrel, the RAS will fit.
Link Posted: 7/27/2013 9:43:18 AM EDT
[#2]
I installed a KAC M4 RAS carbine rails on my HBAR Colt model AR6721 without any problems.

Here's my HBAR barrel's outer diameter dimensions starting from the barrel nut then towards the muzzle, these are just under the handguards.

Front of barrel nut
0.980" OUTER DIA.
0.950" OD
0.845" OD

Does your barrel have a SOCOM profile?

If yours have the SOCOM profile I'm pretty sure its diameter is smaller than my HBAR barrel.


Link Posted: 7/27/2013 9:52:08 AM EDT
[#3]
Discussion ForumsJump to Quoted PostQuote History
Quoted:

If yours have the SOCOM profile I'm pretty sure its diameter is smaller than my HBAR barrel.


View Quote


It definitely is!
Link Posted: 7/27/2013 10:12:16 AM EDT
[#4]
Here's links to the pics.  For some reason I can't get them to load directly to ARF, but here they are.

http://s1272.photobucket.com/user/AZColt/media/IMG_0159_zpsfb1d06ca.jpg.html?sort=3&o=1#/user/AZColt/media/IMG_0159_zpsfb1d06ca.jpg.html?sort=3&o=1&_suid=1374948649260018836990947888527

http://s1272.photobucket.com/user/AZColt/media/IMG_0159_zpsfb1d06ca.jpg.html?sort=3&o=1#/user/AZColt/media/IMG_0158_zpsc7309e26.jpg.html?sort=3&o=0&_suid=1374948649260018836990947888527

http://s1272.photobucket.com/user/AZColt/media/IMG_0159_zpsfb1d06ca.jpg.html?sort=3&o=1#/user/AZColt/media/IMG_0157_zpsc29e3d34.jpg.html?sort=3&o=0&_suid=1374948649260018836990947888527
Link Posted: 7/27/2013 10:18:11 AM EDT
[#5]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Here's links to the pics.  For some reason I can't get them to load directly to ARF, but here they are.

http://s1272.photobucket.com/user/AZColt/media/IMG_0159_zpsfb1d06ca.jpg.html?sort=3&o=1#/user/AZColt/media/IMG_0159_zpsfb1d06ca.jpg.html?sort=3&o=1&_suid=1374948649260018836990947888527

http://s1272.photobucket.com/user/AZColt/media/IMG_0159_zpsfb1d06ca.jpg.html?sort=3&o=1#/user/AZColt/media/IMG_0158_zpsc7309e26.jpg.html?sort=3&o=0&_suid=1374948649260018836990947888527

http://s1272.photobucket.com/user/AZColt/media/IMG_0159_zpsfb1d06ca.jpg.html?sort=3&o=1#/user/AZColt/media/IMG_0157_zpsc29e3d34.jpg.html?sort=3&o=0&_suid=1374948649260018836990947888527
View Quote


OK, looks like it's a cut down 6721 barrel then, so basd on what was posted above, either the M4 RAS or the RIS will work.
Link Posted: 7/27/2013 10:22:27 AM EDT
[#6]
This also tells me I am WAY past due on purchasing a set of callipers.  LOL

Link Posted: 7/27/2013 11:23:53 AM EDT
[#7]











Here' you go.

When posting a pic just pick the Insert Tags that looks like a square with a mountain and sun symbol, then copy and paste your picture URL address.

Looks just like my HBAR contour without measuring it, the KAC RAS would fit that fine.



Here's my 6721 HBAR carbine with my KAC M4 RAS rails installed.


Link Posted: 7/27/2013 11:23:53 AM EDT
[#8]
Oops, double tap post.

Sorry, I have to get me a new mouse.


Link Posted: 7/27/2013 12:40:13 PM EDT
[#9]
Alpha-Romeo3,

Hey, thanks for the advice on the 6993HB, it's very helpful.  I really like your 6721 setup - the 6721 is my favorite.

As for pic posting, I tried that, but it didn't take.  Not sure why, but I must have goofed it somehow.

I appreciate everyone's input.  

Thanks again.
Link Posted: 7/27/2013 3:34:11 PM EDT
[#10]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Alpha-Romeo3,

Hey, thanks for the advice on the 6993HB, it's very helpful.  I really like your 6721 setup - the 6721 is my favorite.

As for pic posting, I tried that, but it didn't take.  Not sure why, but I must have goofed it somehow.

I appreciate everyone's input.  

Thanks again.
View Quote

Thanks MidnightHunter.

The only thing I changed on my 6721 carbine other than the KAC rails was Magpul XTM rail covers, a Magpul AFG1 angled forward grip, Magpul MIAD grip (it is now FDE color same as my buttstock), LMT ambidextrous selector, Vltor IMOD FDE stock, and Troy folding rear backup sight.

The Aimpoint M2 on LaRue cantilever QD mount and Surefire M951 are borrowed from my Colt LE6920 M4 carbine for picture taking.


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