Shop 4,464 Deals on Upper Receivers

Aero Precision A3 Flattop Assembled Left-Handed Upper Receiver

Knight s Armament SR-15 LPR Mod2 18 Barrel URX4 MLOK 5.56 Complete Upper Receiver Assembly

2A Armament Palouse-Lite forged Upper Receiver with Forward Assist 2A-FAU15-1 2A-FAU15-1

LWRC International LWRC IC-A5 5.56mm NATO 16.1" 1:7" 1/2x28 Bbl Black Complete Upper Receiver ICA5U5B16

Knights Armament SR-25 APC Upper Receiver Assembly 308 Winchester 16 Barrel URX 4 M-Lok Handguard

Aero Precision Complete Upper Receiver M4E1 10.5in 5.56 Barrel w/ FSB EM-7 HG Gen 2 FDE Cerakote

Adams Arms P1 Upper 5.56 NATO / .223 Rem 16 Barrel

Sons of Liberty Gun Works East India Starter Kit Combat Grade 10.5in 5.56mm Black

Stag Arms Stag 15 Upper Nitride 5.56 16 Barrel

Spikea (TM)s Tactical Crusader Forged Lower/Upper Receiver Set 223 Remington/556NATO Grey 7a ^3 MLOK Rail

Aero Precision EPC-9 Threaded Complete Upper Receiver 8.3in 9mm w/ ATLAS S-ONE 7.3in Handguard FDE

Radical Firearms Complete Upper Assembly 20 inch 6.5 Grendel SS Match Medium Contour 15 inch RPR Pepper Pot Brake w/BCG and CH Black

Stag Arms AR-15 Upper Receiver Assembly 6mm ARC 20" Barrel M-LOK Handguard without Bolt Carrier Group or Charging Handle

MVB Pistol Caliber Billet Upper Receiver

Knights Armament Company KAC SR-25 APR 20 Upper MLOK

Daniel Defense DD5 V3 .260 Rem 18" Bbl M-LOK Complete Upper Receiver Group 23-158-05060

CMMG MkGs .40S&W Resolute Upper Group Receiver 16.1in Charcoal Green

Battle Arms Development Authority Elite, Complete Upper Receiver, 556NATO, 10.5 in Barrel, Fits AR-15, M-Lok Handguard, Anodized Finish, Black, Includes Bad Rack-15 C Ambidextrous Charging Handle and AR15/M16 BCG BAD-AUTH-UR10.5B-Y-15C

Spikea (TM)s Tactical Calico Jack Lower/Upper Receiver Set 223 Remington/556NATO Green 7a ^3 MLOK Rail

Aero Precision AR-15 EPC-9 Upper Receiver Assembly 9mm Luger 11" Barrel Enhanced M-LOK Handguard without Bolt Carrier Group or Charging Handle Flat Dark Earth

Chiappa Firearms M4-22 Gen Upper 11.8 10rd

Wilson Combat Upper Receiver 5.56x45mm NATO AR-15 Billet Anodized Black

Cross Machine Tool UPUR-1A Big Bore Billet AR-15 Upper Receiver

Centurion Arms CM4 5.56 AR-15 Forged Upper Receiver