Mar 28, 2024 · I cannot thank Ken Elmore at Specialized Armament enough for selling me one of his very rare and very special Colt 6940 Barrel nut wrenches. I would have been happy if I could have found one of the Arrington Wrenches, but now glad I didn't. After I bought my 6940 I also bought one of these Arrington Accuracy Wrenches sold by Brownells.

Jan 3, 2010 · Ya but with the 6940 you know you got colt hand guards ;) I to like the versatilty of the 6920 more. But the 6940 is fine to. The only thing I do not like about the 6920 is the factory front sight.

Jul 26, 2021 · To remove the barrel you would need a Colt barrel wrench specially made for the 6940. Specialized Armament has a 6940 wrench they make in house and they offer parts and a multitude of services for the 6940.

Dec 6, 2022 · I recently purchased a 6940 upper to use on a Colt "M4 marked" 6920 lower I had made around 2013. The upper I got came in the blue box and does not look to have been shot or messed with. The confusing thing though is that the upper receiver has a C stamped receiver with no patent number, but it has a cage code marked barrel.

Nov 16, 2014 · They seem to have the hard to find Colt parts and I love that 6940 even if it takes a little more work to make it your own. Ken should hook you up; he may or may not have the complete 6945 upper. At least Ken would be able to have …

Mar 28, 2024 · I cannot thank Ken Elmore at Specialized Armament enough for selling me one of his very rare and very special Colt 6940 Barrel nut wrenches. I would have been happy if I could have found one of the Arrington Wrenches, but now glad I didn't. After I bought my 6940 I also bought one of these Arrington Accuracy Wrenches sold by Brownells.

Oct 5, 2022 · The stocks on all colt ar15s fit exactly the same as all other colt ar15s. The 6940 is exactly the same as the 6920 except the 6940 has a monolithic upper. Also, the newer production colt rifles probably have outsourced parts. I think most 6940s are older, so will have in-house parts I think. ETA. Forgot the 6940 has a different fsb.

Feb 13, 2025 · FWIW in the Colt Armorers in regards to the 6940 it states to torque to 30' then release, then to 45' release, then to 60'. You can see a not so clear picture of the Colt tool being used with a beam type torque wrench. But used guns won't need seasoned. Tighten to …

Dec 25, 2012 · A piece from Specialized Armament, What is less obvious is the self-centering barrel assy which CANNOT interchange with any other Colt M4 series weapons. This barrel assy utilizes a new type of barrel extension with an indexing slot on the bottom and a male-threaded barrel nut, unlike the indexing pin and female barrel nut familiar to many M16 ...

Aug 8, 2009 · It's been posted all over here that the barrel extension and alignment pin are different on the 6940 from all other Colt AR 15 rifles. I've tried to get "confirmation" of this, but to no avail. I do believe that it is true though. Mine is now for sale. I …