Shop 4,464 Deals on Upper Receivers

Chiappa Firearms G2 PRO UPR 22LR 16-inch 10RD 7.8

SOLGW M4-89 UPPER 556 14.5

Sons of Liberty Gun Works AR-15 L89 Broadsword Upper Receiver Assembly 5.56x45mm 13.9" Cold Hammer Forged Barrel 13" L89 M-LOK Rail with ASR Mount

SLR Rifleworks Billet Upper SLR .308

Cross Machine Tool UPUR-1LH Billet Left Handed AR-15 Upper Receiver

New Frontier Armory New Frontier G-15 Upper Recvr Ar15 Stripped Forged Black

Centurion Arms C4 5.56 Billet AR-15 Upper Receiver

Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Receiver Group Slick Side 16in Mid Burnt Bronze

Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Receiver Group Forward Assist 12.5in Interpose Burnt Bronze

Rock River Arms LR-308 Predator Upper Receiver Assembly 243 Winchester 20" Stainless Steel Barrel 17" M-LOK Handguard Black

Dirty Bird AR-15 Stripped Upper Receiver-Blem - Graphite Black

Adams Arms P2 AARS Upper 5.56 NATO / .223 Rem 16 Barrel

Radical Firearms Complete Upper Assembly 16in 6.8 SPC II HBAR Contour 1/11 Twist 15in MHR M-LOK A2 Flash Hider Black

Aero Precision M4E1-T Complete Upper 5.56x45mm NATO 13.9" Government Contour Barrel 12.7" Mod4 Handguard Olive Drab Green

Chiappa 500095 M4-22 Gen II Pro Upper 22 LR 16 in Steel Barrel, Matte Black Polymer Receiver, 11.80 in Quad Picatinny Rail For Use With Mil-Spec Lower Receivers Includes 2 28rd Mags

Sons of Liberty Gun Works East India Starter Kit Marksman Grade 16in .223 Wylde Black

Cross Machine Tool UPUR-4 Billet AR-15 Upper Receiver - Slick Side

Ghost Firearms Vital Upper Receiver 5.56x45 NATO 16 inch Carbine Length 4150 M4 Barrel 1-7 Twist 11 inch M-LOK Free Float Hand Guard A2 Birdcage Flash

Rock River Arms A4 CMP Trainer AR-14 Complete Upper Receiver 22 Long Rifle 20" Barrel

Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Receiver Group Forward Assist 12.5in Interpose Black

Spikes Tactical Upper 300BLK 16in w/M4 Handguards & FSP

PWS AR-15 MK114 MOD 1-M Upper Receiver Assembly 223 Wylde 14.5" Barrel Pinned FRC Compensator

PWS MK107 MOD 2-M Long Stroke AR-15 Pistol Complete Upper Receiver 223 Remington (Wylde) 7.75" Barrel

Andro Corp Industries AR-15 Upper Receiver Black