Shop 4,484 Deals on Upper Receivers

Aero Precision Complete Upper Receiver M4E1-T .300 16in Blackout Barrel 12in M-LOK ATLAS S-ONE Handguard Flat Dark Earth Cerakote Anodized Black

DEMO Jacob Grey Firearms 9mm 6in Complete Upper Assembly Black 9MMB6CUA

Aero Precision EPC-9 Threaded Complete Upper Receiver 16in 9mm w/ ATLAS R-ONE 15in Handguard FDE

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

Aero Precision Complete Upper Receiver M4E1 .300 Blackout Barrel EQ-12 HG No BCG/Charging Handle Gen 2 FDE Cerakote 16in APAR600232Q14

Aero Precision M4E1 Mid Barrel Complete Upper Receiver w/Flash Hider AR-15 5.56x45mm NATO 16in Mid Length Barrel 12in M-LOK Handguard No BCG/CH Magpul

OpticsPlanet Exclusive Daniel Defense Upper Receiver 14.5 in 1/7 Twist Mil Spec Ceracote Finish Black/Brown

Spikes Tactical Upper 5.56 16in M4 LE w/7in SAR3 Rail & FSP

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

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

Precision Reflex AR-15 Flat Top Upper Receiver - Striped FDE

Precision Reflex AR-15 Flat Top Upper Receiver - Striped Black

OpticsPlanet Exclusive Faxon Firearms Complete Upper Receiver ARAK-21 16in 5.56 MuzzLok Sand

CMMG Dissent Mk3 .308 Winchester 20 inch Upper Receiver 1-10 Twist 5/8 x 24 CMMG ZEROED Muzzle Brake Cerakote/Hard Coat Anodized Titanium

LaRue Tactical Complete Match Grade Upper Receiver 18in .308 1-8 Twist A2 Flash Hider Black

Stag Arms AR-10 Stag 10 Stripped Upper Receiver .210 DPMS High Profile Assembled Cerakote FDE

Stag Arms AR-15 Tactical Upper Receiver 5.56x45mm NATO 7.5in Barrel GOV-CMV Profile 1-7 Twist 1/2x28 Left Hand VG6 Delta Chromephos FDE

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

Aero Precision M4E1 Complete Upper Receiver 16in 5.56 M4 Carbine Barrel EQ-12 HG Gen 2 FDE Cerakote

Fortis Manufacturing Billet Upper Receiver Stripped Black

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

Aero Precision M4E1-E Complete Upper 14.5in 5.56 M4 Carbine Barrel EQ-12 Handguard Gen 2 Anodized Black

Aero Precision M5 Complete Upper Receiver 18in 6.5 Creedmoor SS Mid-Length Barrel w/ATLAS S-ONE 15in M-LOK Handguard Anodized Flat Dark Earth

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