Results for 5.56 NATO Receivers

Primary Weapons Systems MK1 Mod 2-M Complete Lower 5.56x45mm, Black

Geissele AR-15 Super Duty MOD1 Pinned and Welded Complete Upper Receiver 5.56x45mm 13.9" Cold Hammer Forged Barrel M-LOK DDC

Geissele AR-15 Super Duty MOD1 Complete Upper Receiver 5.56x45mm 10.3" Cold Hammer Forged Barrel M-LOK DDC

Geissele AR-15 Super Duty MOD1 Complete Upper Receiver 5.56x45mm 10.3" Cold Hammer Forged Barrel M-LOK Black

Battle Arms AR-15 Workhorse Upper Receiver Assembly without BCG 223 Remington (Wylde) 16" Barrel 15" M-LOK Handguard Black

Colt AR-15 Pistol Complete Upper Receiver 5.56x45mm NATO 14.5" Barrel

BCM MOD-0 AR-15 Complete Lower Receiver Black

American Defense UIC Stripped Lower 5.56/.223

Geissele AR-15 Super Duty MOD1 Complete Upper Receiver 5.56x45mm with Pinned 14.5" Cold Hammer Forged Barrel M-LOK Black

Colt AR-15 Pistol Complete Upper Receiver 5.56x45mm NATO 11.5" Barrel

Geissele AR-15 Super Duty MOD1 Complete Upper Receiver 5.56x45mm 12.5" Cold Hammer Forged Barrel M-LOK DDC

FightLite MCR Dual-Feed 16.25" Upper 5.56x45mm 1:7 Mil-Std 1913 Picatinny Rail, Black

Geissele AR-15 Super Duty MOD1 Complete Upper Receiver 5.56x45mm 12.5" Cold Hammer Forged Barrel M-LOK Black

BCM BCM4 Mod-0 AR-15 Complete Lower Receiver Anodized Flat Dark Earth

San Tan Tactical STT-15 Billet AR-15 Ambidextrous Stripped Lower Receiver Anodized Black

Geissele AR-15 Super Duty MOD1 Complete Upper Receiver 5.56x45mm 16" Cold Hammer Forged Barrel M-LOK DDC

BCM BCM4 AR-15 Complete Lower Receiver Anodized Flat Dark Earth

BCM AR-15 Complete Lower Receiver Anodized Black Pistol Receiver Extension

Geissele AR-15 Super Duty MOD1 Complete Upper Receiver 5.56x45mm with Pinned 14.5" Cold Hammer Forged Barrel M-LOK DDC

Battle Arms Workhorse AR-15 Pistol Barreled Upper Receiver 5.56x45mm NATO 9.5" Barrel

LWRC IC Complete Lower Black 5.56 / .223 Rem

Geissele AR-15 Super Duty MOD1 Pinned and Welded Complete Upper Receiver 5.56x45mm 13.9" Cold Hammer Forged Barrel M-LOK Black

Bootleg Lower 5.56x45mm AR Lower, Black - BPLR1 - BPLR1

Shield Arms SA-15 Stripped Lower Receiver 223Rem/556NATO