Shop 4,483 Deals on Upper Receivers

Aero Precision Complete Upper M4E1-E 5.56 20in Rifle Barrel 1/7 Twist EQ15 Cerakote Black

Stag Arms AR-15 Covenant Left Hand Upper Receiver 6mm 16in Barrel BULL Profile 1-7 Twist 5/8-24 Thread VG6 Gamma Black

WMD Guns AR-15 A3/A4 Upper Receiver Forged w/M4 Feed Ramps NiB-X Pink Sherbert 1-NIBXURF-Pink Sherbert

WMD Guns AR-15 A3/A4 Upper Receiver Forged w/M4 Feed Ramps NiB-X Marine Corp Red 1-NIBXURF-Marine Corp Red

WMD Guns AR-15 A3/A4 Upper Receiver Forged w/M4 Feed Ramps Stripped NiB-X Battle Grey 1-NIBXUF-Battle Grey

OpticsPlanet Exclusive Daniel Defense Custom A4 Upper Receiver Group 14.5 in GV MID Daniel Defense Extended Flash Suppressor MFR 13.5 Mil Spec

Spikes Tactical Upper 5.56 16in M4 LE w/BLK MOE Handguard & FSP

CMMG Mk4 .300BLK Banshee Upper Group Receiver 8in 1-7 Twist 5/8 X 24 TPI 16.5in Midnight Bronze

Spikes Tactical Upper 5.56 16in M4 LE w/13.2in M-LOK Rail

Aero Precision Complete Upper Receiver M4E1 16in 5.56 Mid Pencil Barrel EQ-15 HG Gen 2 FDE Cerakote

Aero Precision Complete Upper Receiver M4E1-T 5.56x45mm NATO 11.5in Government Carbine Length 1 in 7 1/2 x 28 10.3in A2 Flash Hider Anodized Kodiak

Aero Precision Complete Upper Receiver M4E1-T .223 Wylde 18in SPR - Fluted Rifle Length 1 in 8 1/2 x 28 15in A2 Flash Hider Cerakote FDE

Aero Precision Complete Upper Receiver M4E1-T .223 Wylde 18in Government Rifle Length 1 in 8 1/2 x 28 15in A2 Flash Hider Cerakote FDE

Quarter Circle 10 Side Charging Complete 45 ACP Upper Receiver Assembly 5.5in Barrel Black

Aero Precision M4E1 Complete Upper Receiver 18in .223 Wylde Rifle Barrel EM-15 HG Gen 2 Cerakote FDE

Black Rain Ordnance Upper Receiver 5.56 Black

WMD Guns AR-15 A3/A4 Upper Receiver Forged w/M4 Feed Ramps NiB-X Prison Pink 1-NIBXURF-Prison Pink

WMD Guns AR-15 A3/A4 Upper Receiver Forged w/M4 Feed Ramps Stripped NiB-X OD Green 1-NIBXUF-OD Green

WMD Guns Upper Assembly Forged AR-15 MLOK HG 15in NiB-X Nickel

Aero Precision Complete Upper M4E1-E .223 Wylde 16in Mid-Length EQ15 Cerakote FDE

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Pistol 10in Quadrail Handguard Complete Upper Receiver w/BCG And Charging Handle Black

CMMG Mk4 .300BLK Resolute Upper Group Receiver 16.1in Midnight Bronze

Spikes Tactical Upper 5.56 11.5in FN CHF w/7in SAR3 Rail & FSP

Aero Precision M4E1 Complete Upper Receiver .223 Wylde Mid Barrel EM-12 HG No BCG/Charging Handle Gen 2 FDE Cerakote 16in APAR600232M9