Shop 4,484 Deals on Upper Receivers

Guntec USA AR .308 Gen 2 Stripped Billet Upper Receiver Grey

Guntec USA AR-15 Stripped Billet Upper Receiver Anodized Purple

Ghost Firearms Elite Complete Upper Receiver 7.62x39 16 inch Carbine Length 4150 Light HBAR Barrel 1-10 Twist 14 inch M-LOK Free Float Hand Guard A2

Ghost Firearms Elite Complete Upper Receiver 7.62x39 10.5 inch Carbine Length 4150 M4 Barrel 1-10 Twist 9 inch M-LOK Free Float Hand Guard A2 Flash

Ammunition Storage Components AR-15 Billet Slick Side Upper Receiver Stripped Hardcoat Anodize Black

Stag Arms AR-15 Tactical Right Hand Upper Receiver 5.56 NATO 7.5in Barrel GOV-CMV Profile 1-7 Twist 1/2 x 28 Thread VG6 Delta Nitride FDE

Stag Arms AR-15 Tactical Upper Receiver 5.56x45mm NATO 16in Barrel Hanson Profile 1-7 Twist 1/2x28 Left Hand VG6 Gamma Black

Spikes Tactical Upper 5.56 16in Midlength LE w/10in BAR2 Rail

Aero Precision Complete Upper Receiver M4E1 .300 Blackout Barrel EQ-15 HG No BCG/Charging Handle Gen 2 FDE Cerakote 16in APAR600252Q14

Aero Precision Complete Upper Receiver w/Flash Hider M4E1 .300 Barrel EQ-9 HG No BCG/Charging Handle Gen 2 FDE Cerakote 10in APAR600222Q4

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

Aero Precision M4E1-T PRO CHF M4 5.56mm 11.5 inch Complete Upper Receiver Hanson Carbine Length 1-7 Twist A2 Birdcage Anodized Black

Guntec USA AR .308 Gen 2 Stripped Billet Upper Receiver Purple

Guntec USA AR-15 Stripped Billet Upper Receiver Blue

USED Daniel Defense DDM4 300 S URG 300 AAC Blackout 1/8 S2W LPG DDM4 Rail 9.0 DDFS Complete Upper Receiver w/ Flash Hider Black 10.3in

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

WMD Guns AR-15 A3/A4 Upper Receiver Forged w/M4 Feed Ramps Stripped NiB-X Cobalt

Ghost Firearms Elite Complete Upper Receiver 7.62x39 16in Carbine Length 4150 Light HBAR Barrel 1-10 Twist 14in M-LOK Free Float Hand Guard A2 Flash

Stag Arms AR-15 Tactical Upper Receiver .300 AAC Blackout 16in Barrel Hanson Profile 1-7 Twist 1/2x28 Right Hand VG6 Delta FDE

Aero Precision M4E1 Threaded No Forward Assist Complete Upper Receiver 16in 5.56 Mid SM15 FDE

Aero Precision Complete Upper Receiver M5E1 24in Barrel 6.5mm Creedmoor Rifle Length 1-8 Twist 416R Stainless Steel EM15 Handguard FDE Cerakote

Aero Precision Complete Upper Receiver M4E1-T 5.56 16in M4 Barrel 12in M-LOK ATLAS S-ONE Handguard Anodized Black

Spikes Tactical Upper 5.56 16in Midlength LE w/12in M-LOK Rail

Spikes Tactical Upper 5.56 16in M4 LE w/9in SAR3 Rail