Shop 4,464 Deals on Upper Receivers

Quarter Circle 10 45 ACP Complete Upper Receiver w/ PMUR 16in Barrel .578-28 15in HG FH Black

Range Tool AR15 Complete Upper Assembly w/Odin Handguard 5.56mm 16 in Barrel 1-9 Twist MIL- Spec Hardcoat Anodize Black

Aagil Arms Complete AR-15 .300 Blackout Upper Assembly 16in Barrel Length Carbine 1-8 Twist w/ 15in M-Lok Nitrate Anodized Black Medium

CMMG Upper Group Dissent Mk47 7.62X39 16.1in Empire Profile Non-Threaded Sniper Grey

CMMG Dissent Mk4 .350 Legend 16.1in Empire Profile Upper Group Charcoal Green

Bootleg Stripped Upper Receiver For AR 15 Black

USED Aero Precision M4E1 Threaded .300 Blackout Complete Upper Receiver 10in 1-7 Twist 5/8x24 Thread ATLAS R-ONE Handguard FDE Cerakote

USED Aero Precision M4E1 Assembled Upper Receiver Thread M-LOK Handguard Anodized OD Green EDEMO2 Used Condition Like New

DEMO Aero Precision M4E1 5.56 Enhanced Upper Receiver No Forward Assist Anodized Black

Jacob Grey Firearms Complete Upper Assembly 5.56 NATO 10.5in 1-7 Twist 1/2x28 Thread Black

Jacob Grey Firearms 9mm 8.3in Complete Upper Assembly Black

Rock River Arms Completed Upper Receiver X-1 .308/7.62x51mm 18 Inch Barrel 1-10 Twist 5/8-24 Threat Free-Float Handguard Brake Tan

EDEMO Matador Arms Upper Reciever Mat-9K 9mm 5 inch Barrel 1-10 Twist 1/2x28 Threads Gray EDEMO1

Blackout Defense Dual Taper Lock Mid Complete Upper 16in Barel M-LOK Handguard Green

Blackout Defense Dual Taper Lock Mid Complete Upper 13.9in Barel M-LOK Handguard Grey

Blackout Defense Complete Dual Taper Lock .300 AAC Upper Receiver Group Slick Side 9in Pistol FDE

Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Receiver Group Forward Assis 16in Mid Green

Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Receiver Group Forward Assis 16in Mid Grey

Brigade Manufacturing AR Upper Receiver Forged Midnight Bronze w/ Dustcover and Forward Assist

Tiger Rock Complete Upper Receiver AR-15 5.56 NATO 7in Pistol Length 1-8 Twist w/ 7in Super Slim M-LOK Handguard Black Large

Tiger Rock AR-15 Super Slim Light Handguard Kit 5.56mm 12 in 16in Barrel M4 A2/Government Pistol 1x7 Twist 1/2x28 Thread 15in M-Lok Handguard Brake

Luth-AR 18 in MARK12 Complete Upper Barrel Assembly MLOK Black 18

Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Receiver Group Forward Assist 12.5in Interpose Green

Del-Ton Pre-Ban M4 Carbine Rifle Kit w/Black MLOK Furniture 5.56x45mm NATO 16 in 1-9 Twist Matte Black