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View Full Version : Bushmaster Carbon-15 Rifle Barrel Assembly


shocknm
03-23-2015, 7:50 PM
The Carbon 15's M4 profile barrel assembly includes an Izzy flashhider pinned and welded in place. Barrel measures 16-3/4" long overall. Marked BMP 5.56 NATO 1/19. Also included is the barrel nut, front sight base with bayonet lug, and handguard cap. Note: Will only work on Carbon-15 model, barrel nut has larger threads and will not fit standard AR uppers. Front sight post not included.

I'm assuming the "1/19" is a typo, and it's 1/9... beside that, what's with the "Will only work on Carbon-15 model..." is that just because of the barrel nut threads? If one swaps the barrel nut should this fit milspec uppers? Or is there something else going on with this barrel that makes it "special."

:cool:

ar15barrels
03-23-2015, 11:55 PM
is there something else going on with this barrel that makes it "special."

The barrel extension is 1" diameter and will fit into standard aluminum receivers.
The reason that the barrel nut threads are larger on the plastic receivers is that some of the threads were breaking off the front of the receivers when they were using standard size barrel nut threads.

shocknm
03-24-2015, 6:19 PM
Great, thank you Randall !