Shop 4,464 Deals on Upper Receivers

Ghost Firearms Elite Complete Barreled Upper Receiver Blue Titanium

Ghost Firearms Elite Complete Upper Receiver 9mm 9x19 Para 16 inch 4150 Light HBAR Barrel 1-10 Twist 14 inch M-LOK Free Float Hand Guard A2 Flash

Ghost Firearms Upper Receiver Rifle Lower Parts Kit 7.62x39 16in Carbine 4150 Light HBAR Barrel 1-10 Twist 14in M-LOK Free Float Hand Guard A2 Muzzle

Grid Defense Complete Upper Receiver .300 Blackout 16 inch Pistol Length 4150 Light HBAR Barrel 1-8 Twist 14 inch M-LOK Rail A2 Flash Hider Tungsten

Vltor Vis Fusion 9in Carbine Keymod Deflector Only Black

Vltor Vis Fusion Carbine 12in with Keymod And Forward Assist Black

Rock River Arms BT-3 Completed Upper Receiver 6.5mm Creedmoor 28in 20in Barrel Standard SS Fluted Profile 1-10 Twist 5/8x24 Thread M-LOK Handguard

EDEMO Lead & Steel Arc Mil Spec Stripped Upper Receiver Forged 7075-T6 Earth LS-SURF-FDE EDEMO1 Used Condition Fair

Guntec USA AR-15 Stripped Billet Upper Receiver w/9in Ultralight Series M-Lok Handguard Flat Dark Earth

Guntec USA Stripped Billet Upper Receiver .308 Gen 2 Anodized Red

Anderson AR-15 Stripped Upper Receiver

USED Bootleg Inc Upper Receiver AR-15 Complete Retal Packaging Black BP-UR-1A

USED TRYBE Defense AR-15 Pistol Complete Upper Receiver 5.56mm 10.5in 1-7 Twist A2 Flash hider EDEMO1 Used Condition Fair

Rock River Arms Completed Upper Receiver Predator HP A4 .308/7.62X51mm NATO 16 Inch Barrel 1-10 Twist Free-Float Handguard Brake Black

Rock River Arms Completed Upper Receiver Operator ETR .308/7.62x51mm 16 Inch Barrel 1-10 Twist Mid-Length Profile 5/8-24 Threat Free-Float Handguard

Jacob Grey Firearms .300 Blackout 10in Complete Upper Assembly AR-15 Black

Jacob Grey Firearms Complete Upper Assembly 9mm 10in 1-10 Twist 1/2x36 Thread Black

TRYBE Defense AR-15 Builder's Kit 5.56x45mm NATO 10.5in Upper Receiver

CMMG Mk3 6.5 Creedmoor Endeavor Upper Group Receiver 20in Sniper Grey

CMMG Mk3 6.5 Creedmoor Endeavor Upper Group Receiver 20in Charcoal Green

CMMG 5.7X28mm Banshee Upper Group Receiver 8in Coyote Tan

CMMG MkG .45 ACP Banshee Upper Group Receiver 8in Titanium

CMMG MkGs .40 S&W Banshee Upper Group Receiver 8in Tungsten

CMMG Mk4 .350 Legend Resolute Upper Group Receiver 16.1in Midnight Bronze