Photo 34 of 34, Colt Model 920 (M4) carbine

Here the bayonet is mounted on the original 16" barrel, you can see that the muzzle ring would line up perfectly w/the joint of the FH in the 14.5" barrel on top (this is a 14.5" barrel w/a permanently fitted extended A2 FH which makes it a legal 16" length barrel), this is the only proper solution to build an accurate "replica" of the M4 carbine which will correctly mount the bayonet.

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M4 R mzzl comparison w-bay Here the bayonet is mounted on the original 16" barrel, you can see that the muzzle ring would line up perfectly w/the joint of the FH in the 14.5" barrel on top (this is a 14.5" barrel w/a permanently fitted extended A2 FH which makes it a legal 16" length barrel), this is the only proper solution to build an accurate "replica" of the M4 carbine which will correctly mount the bayonet.
Photo 34 of 34, M4 R mzzl comparison w-bay.jpg, 91KB, 1002x779, 661 Hits Other Sizes: Original
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