Shop 4,464 Deals on Upper Receivers

Bilson Arms Pump Style Forward Charging Upper Assembly 350LGNDFC-UA 16 inch 1-16 Twist Cerakote Sniper Green & Grey

2A Armament Balios Lite 10.5In G2 5.56 Complete Upper M-Lok Black 10.5in

Rock River Arms Completed Upper Receiver Left Handed RAGE 2G .223/5.56mm 10.5 Inch Barrel Pistol Profile 1/2-28 Thread Free-Float Handguard A2 Flash

Presma AR-15 223/5.56 Stripped Upper Receiver w/Square Mark Black

Del-Ton Pre-Ban Flat Top Light Weight Barrel Assembly 16in Carbine Chrome Lined

Tiger Rock AR Build Kit BCG LPK and Magpul SL Kit 9mm Caliber 11in 16in Barrel Straight 1x10 Twist 1/2x36 Thread 15in M-Lok Handguard Compensator

Tiger Rock AR Complete Upper Receiver 9mm Caliber 24in 16in Barrel Straight 1x10 Twist 1/2x36 Thread 15in M-Lok Handguard Compensator Nitride Anodized

Luth-AR Bull Rifle Kit Minus Lower Receiver w/ Collapsible Stock .223 31in 24in Bull Rifle 1x9 1/2x28 Picatinny KeyMod A2 Flash Hider Anodized

CMMG Upper Group Resolute Fixed Ejector MkG . 45 ACP 16.1in 1-16 Twist 0.578-28 TPI Sniper Grey

CMMG Upper Group Dissent Mk3 .308Win 16.1in Empire Profile Non-Threaded Hard Coat Anodized

CMMG Upper Group Dissent Mk47 7.62X39 16.1in Empire Profile Non-Threaded Charcoal Green

CMMG Dissent Mk4 .350 Legend 16.1in Empire Profile Upper Group Coyote Tan

Spikes Tactical Upper 5.56 14.5in 16in OAL Midlength Lightweight LE w/12in SAR3 Rail w/ Dynacomp

Spikes Tactical Upper 5.56 14.5in 16in OAL Midlength Lightweight LE w/Mid Length Handguards w/ Vortex FH

Spikes Tactical Upper 300BLK 10in Billet w/12in BAR2 Rail

UnbrandedAR 12in Forged Upper Receiver Group Assembly AR15 7075-T6 Black Anodize .223 Wylde 16in BBL Govt MLG Nitride 12in Handguard MLOK A2 Flash

CMMG Dissent Mk4 6mm ARC 16.1in Upper Group 1-7.5 Twist 5/8 X 24 TPI .750in 25.5in Coyote Tan

American Defense Manufacturing 5.56 12.5 Inch Barrel M-Lok Rail Upper Reciever Midnight Bronze 12.5 in

CMMG Mk3 6.5 Creedmoor Endeavor Upper Group Receiver 20in Tungsten

ABC RIFLE COMPANY AR 9mm Luger 16in Barrel w/12in Quadrail Handguard Upper Receiver w/BCG And Charging Handle 1-8 Twist A2 Style Muzzle Brake Nitride

ABC RIFLE COMPANY AR-15 7.62x39mm Micro Pistol 5in Barrel M-LOK Handguard Upper Receiver w/BCG And Charging Handle Burnt Bronze

Stag Arms AR-10 Stag 10 Upper Receiver Assembly .210 DPMS High Profile Left Hand Cerakote FDE

Stag Arms AR-10 Long Range Left Hand Upper Receiver 6.5 Creedmore 24in Barrel NJ Compliant HBAR-CMV Profile 1-10 Twist 5/8X24 Thread VG6 Gamma Black

Unique-ARs Original Freedom Complete Upper Receiver Cerakote Armor Black/Anodize Black