Shop 4,464 Deals on Upper Receivers

Matrix Arms Dual Charge Upper Receiver/Enhanced BCG Package 9mm Hardcoat Anodized Black

Radical Firearms Complete Upper Assembly 16in 12.7x42 .936 1/20 Twist 15in MHR M-LOK Panzer Brake Black

Aero Precision M4E1-T PRO CHF M4 5.56mm 13.9 inch Complete Upper Receiver Hanson Mid Length 1-7 Twist A2 Birdcage Anodized Kodiak Brown

Brigade Manufacturing AR Complete Upper Receiver Forged 5.56 16 inch Barrel Midnight Bronze Charging Handle 15 inch Rail A2 Flash Hider

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

Tiger Rock Complete Upper Receiver .300 Blackout AR 7.5in Pistol Length 1-7 Twist w/ M-LOK Handguard Black Large

Tiger Rock Complete Upper Receiver AR 7.62X39 16in Carbine Length 1-10 Twist w/ 12in M-LOK Handguard Black Large

Tiger Rock AR Rifle Build Kit BCG LPK and Stock Kit .300 AAC Blackout 24in 16in Barrel HBAR Carbine 1x8 5/8x24 15in M-Lok Handguard Compensator

Tiger Rock AR-15 Barrel BCG LPK and Rogers Stock 5.56mm 17in 16in Barrel M4 A2/Gov Carbine 1x8 1/2x28 15in M-Lok Handguard Brake Nitride Anodized

Aero Precision M4E1-T Complete Upper 20in 6.5 Grendel Stainless Steel Barrel SM15 FDE Cerakote

Aero Precision Complete Upper Receiver M4E1-T 5.56x45mm NATO 20in Government Rifle Length 1 in 7 1/2 x 28 15in A2 Flash Hider Cerakote FDE

Aero Precision Complete Upper Receiver M4E1-T 5.56 16in Mid-Length Barrel 12in M-LOK ATLAS S-ONE Handguard Cerakote Flat Dark Earth

Del-Ton Pre-Ban M4 Profile Flat Top Barrel Assembly 16in Chrome Lined

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

POF USA Renegade Plus Upper Receiver Assembly 5.56mm 16.5in Barrel M-LOK Rail Burnt Bronze

CMMG Endeavor 100 MK4 Upper 6mm ARC 20 Barrel 10-Rounds

Rock River Arms Completed Upper Receiver Left Handed RAGE 2G .223/5.56mm 16 Inch Barrel 1/2-28 Thread A2 Flash Hider Black

CMMG Upper Group Dissent Mk47 7.62X39 12.5in 1-10 Twist 5/8 X 24 TPI .750in 22in Midnight Bronze

CMMG Banshee Mk47 7.62x39mm 12.5in Gen 2 Complete Upper Receiver MT Carbine 1-10 Twist 5/8x24 TPI Armor Black

CMMG Upper Group Dissent Mk47 7.62X39 16.1in 1-10 Twist 5/8 X 24 TPI .750in 26in Charcoal Green

CMMG Mk47 Upper Receiver Assembly Armor Black

CMMG MkG .45 ACP Banshee Upper Group Receiver 8in Sniper Grey

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

CMMG MkGs .40S&W Resolute Upper Group Receiver 16.1in Sniper Grey