The current US service rifle, M4/M4A1 is a 14.5" collapsible stock developement from the M16A2, it's the primary US combat arm in Afghanistan & Iraq. This M4 "replica" is based on a Colt 6520 carbine lower w/an M4 upper w/14.5" M4 barrel that has an xtended A2 FH pinned to the barrel to make it a legal 16", the use of the 14.5" original length barrel & the extended FH for the extra length allows the bayonet to fit the rifle properly.
Album by willyp. Photos by willyp. 1 - 34 of 34 Total. 25272 Visits.
M4
M4 brite
M4 door open
M4 Stk xtended
M4 stock
M4 xtension bottom 4 pos
M4 buffer mkg
M4 small FA button
M4 action
M4 Action door open
M4 forend
M4 FSB
M4 L muzzle
M4 L F swivel
M4 L FSB mkg
M4 L forend
M4 L action
M4 L Rr sght
M4 L stock
M4 L stk xtended
M4 L
M4 all R
M4 all R actn buis up
M4 all R accs actn
M4 all R forend
M4 all L action
M4 all L bottom forend
M4 all R top actn
M4 all R top Buis
M4 all L
Original 16" barrel w/M9 bayonet The 16" barrel on the 6920 makes it unable to properly mount the bayonet as the muzzle ring sits in the middle of the barrel.
M4 14.5" vs 16" barrel comparison Top: Colt 6920 w/an original M4 14.5" barrel which has been fitted w/a Sabre Defence extended A2 FH permanently mounted to bring it to legal length. Botom: Original 6920 16" barrel w/standard A2 FH.
M4 R muzzl comparison Top: 14.5" w/permanent xtended A2 FH Bottom: standard 6920 16" barrel You can see the difference in the location of the first "joint" of the FH which is what supports the muzzle ring on the M7/M9 bayonets, the original 16" barrel has this joint too far forward.
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.
