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56 Government Profile Midlength AR-15 Barrel, Modern Series w/ FSB, Triangle Handguard Cap and Delta Ring Assembly Ballistic Advantage $186.

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5' government profile barrel (Colt in-house made barrel, desirable, made prior to switched to current CAGE code barrel) BCM Extended A2 flash hider pinned and weld for Non-SBR compliance F marked FSB Genuine KAC RAS handguard USGI side sling mount (currently installed for lefty, but can be switched for right-hand) USGI.

Steel construction and a precise fit on a.

56 barrel is the most accurate and longest lasting barrel attainable for your AR-15 build. 625' barrel makes the most sense, hence the gun above would also make the most sense. HPT/MPI Tested with an M4 barrel extension and F marked FSB. As for bedding the barrel extension into the upper, I normally do that on my вЂњbuildsвЂќ but this is a simple fix for a mass produced run of the mill gun. I just need a Genuine 16' Colt 9mm AR barrel in return. We carry a varitey of upper receivers in many barrel lengths and rail configurations. 75' journal and 'F' height FSB Unfortunately, this barrel possesses a flaw that made it completely unusable for me. It matted up perfectly with my colt upper and when I got my colt sight block and on the barrel I realized that it was slotted which was a pain staking process to solve considering most gun smiths in my area were unwilling to spend. I bought one and used a SP1 lower to test fire at 100 yards, it grouped just like an issue barrel, nothing special. Not sure what Colt is doing, but I would like to have had another Keyhole lower instead of this rougher one.

I think the new barrel was like $240 and I sold the old one for $125 or so. These barrels are the result of tens of thousands of dollars in development done by the U.

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