Shop 4,483 Deals on Upper Receivers

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

Stag Arms AR-15 A3 Flattop Upper Receiver Assembly Direct Impingement Type 3 Hard Coat Anodized Right Hand Black

Spikes Tactical Upper 5.56 16in M4 LE w/9in M-LOK Rail

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

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

Guntec USA AR-15 Stripped Billet Upper Receiver .223 Remington / 5.56mm Matte Rainbow Pvd Coated

V Seven Enlightened 2055 Lithium/Aluminum Ar-15 Upper Receiver ENLI UR-LIT

Aero Precision Complete Upper Receiver M4E1-T .223 Wylde 16in SPR - Fluted Mid Length 1 in 8 1/2 x 28 15in A2 Flash Hider Cerakote FDE

Ammunition Storage Components AR-15 Billet Slick Side Upper Receiver 7in Free Float MLOK Handguard Combo Black

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

Spikes Tactical Upper 5.56 11.5in FN CHF w/M4 Handguards & FSP

Aero Precision Complete Upper Receiver M4E1 .223 Wylde Mid Barrel EQ-12 HG No BCG/Charging Handle Gen 2 Anodized Black 16in APAR600231Q9

CMMG Upper Receiver Assembly Mk4/AR15 Forward Assist Titanium

Guntec USA AR-15 Stripped Billet Upper Receiver Anodized Orange

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

Aero Precision M5 Complete Upper Receiver 20in 6.5 Creedmoor SS Rifle Barrel w/ATLAS S-ONE 15in M-LOK Handguard Anodized Flat Dark Earth

USED Faxon Firearms Faxon AR-15 Stripped Upper Receiver Type II Bolt Nitrided FF65GBCNITRIDE UR-FAX-F-A-C

Grid Defense Complete Upper Receiver 5.56mm 7.5 inch Pistol Length 4150 M4 Barrel 1-7 Twist 9 inch Octagon M-LOK Rail Dimpled Flash Can Tactical Grape

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

CMMG Upper Group Dissent 45 Acp 6.5in Sniper Grey

Stag Arms AR-15 A3 Flattop Upper Receiver Stripped Direct Impingement Type 3 Hard Coat Anodized Left Hand Black

Spikes Tactical Upper 5.56 16in M4 LE w/12in BAR2 Rail

Aero Precision Complete Upper Receiver M4E1 .223 Wylde Mid Barrel EQ-12 HG No BCG/Charging Handle Gen 2 FDE Cerakote 16in APAR600232Q9

Aero Precision Complete Upper Receiver M4E1 .300 Blackout Barrel EM-12 HG No BCG/Charging Handle Gen 2 Anodized Black 16in APAR600231M14