Factory Colt Parts

Factory Colt M4 profile, 14.5 inch, 5.56x45mm NATO, carbine length gas system barrel. Complete barrel assembly features M4 feed ramp, barrel nut, fixed front sight tower with sight post, and is threaded 1/2-28 for your choice of muzzle device.

Factory Colt carbine length handguard assembly for M4/AR15 type rifles.

Factory Colt M4 Commando FBI HRT profile, 11.5 inch, 5.56x45mm NATO, carbine length gas system barrel. Complete barrel assembly features M4 feed ramp, barrel nut, low profile gas block, and is threaded 1/2-28 for your choice of muzzle device.

Factory Colt M4 Commando complete 5.56mm semi-auto lower receiver assembly to build your AR15, M16 or M4. Compatible with all mil-spec AR15/M4/M16 upper receivers. Manufactured to truly meet and exceed all Mil Spec standards. Marked with "M4 Commando"...

Factory Colt M4 CQB profile, 10.3 inch, 5.56x45mm NATO, carbine length gas system barrel. Complete barrel assembly features M4 feed ramp, barrel nut, fixed front sight tower with sight post, and is threaded 1/2-28 for your choice of muzzle device.

Factory Colt 4-position receiver extension for M4/AR15 type rifles.

Factory Colt Rifle Buffer for AR15/M16 full length rifles.

Factory Colt rifle length gas tube for M16/AR15 style firearms. Stainless steel construction to mil-spec.

Factory Colt SCW complete bolt carrier group assembly for your AR15, M16 or M4 is the only BCG manufactured to truly meet and exceed all Mil Spec standards. Compatible with full-auto or semi-auto receivers. The bolt carrier and bolts are MPI tested &...

Factory Colt tungsten 1.5 ounce buffer weight, used in H, H2 and H3 buffers.

The Magpul MBUS (Magpul Back-Up Sight) is a low-cost, color injection molded, folding back-up sight. The MBUS Front Sight is adjustable for elevation and fits most 1913 Picatinny-railed hand guards, but is specifically tailored to the AR15/M16 platform...