Shop 4,464 Deals on Upper Receivers

Ghost Firearms Upper Receiver Pistol Lower Parts Kit .300 Blackout 10.5in Pistol 4150 Light HBAR Barrel 1-8 Twist 11in M-LOK Free Float Hand Guard

Ghost Firearms Upper Receiver Pistol Lower Parts Kit .300 Blackout 10.5in Pistol Light HBAR Barrel 1-8 Twist 11in M-LOK Free Float Hand Guard Flash

Ghost Firearms Upper Receiver Pistol Lower Parts Kit .300 Blackout 10.5in Pistol 4150 Moly Steel Barrel 1-8 Twist 9in M-LOK Free Float Hand Guard A2

USED JARD AR Side Charge .223/5.56 Complete Upper Receiver Assembly Black EDEMO2 Used Condition Like New

DEMO Sons of Liberty Gun Works East India Starter Kit Combat Grade 12.5in 5.56mm Black

DEMO Aero Precision M4E1 Threaded Assembled Upper Receiver M16/AR-15 Anodized Black

USED Aero Precision M4E1 Complete Upper Receiver AR-15 10.5 in Rifle Length Barrel 9 in M-LOK Handguard No BCH/CH Anodized Black

DEMO Aero Precision EPC-9 Threaded Complete Upper Receiver 11in 9mm w/ ATLAS R-ONE 10.3in Handguard FDE

Aagil Arms Ted Nugent's Signature Series 6.5 Grendel AR-15 Upper Assembly w/ 15in Cobra Style Handguard US Flag Cerakoted

Bear Creek Arsenal BC-10 .308 Winchester 16in Bolt Action Style Upper Receiver SOCOM 1-10 5/8x24 Flash Hider Black Nitride Black

Bear Creek Arsenal BC-15 .350 Legend 16in Bolt Action Style Upper Receiver M4 Contour 1-16 Twist 5/8x24 Flash Hider Parkerized

DEMO Andro Corp Industries AR-15 Complete M-LOK Upper Receiver with Flash Hider Assembly w/Fmark Front Sight Base 5.56 NATO 18.75in 10.3in Barrel Govt

FM Products MIKE-9 9mm Complete Upper Receiver 17.75 inch 10 inch Barrel Front Charge 1-10 Twist 1/2x36 Thread Free-Float Nitride Black

Aagil Arms Complete AR-15 5.56 NATO Upper Assembly 16in Barrel Length Carbine 1-7 Twist w/ 15in Clamp on Key Mod Cerakote Robin Egg Blue Medium

Aagil Arms Complete AR-15 5.56 NATO Upper Assembly 10.5in Stainless Steel Length Carbine 1-8 Twist w/ 10in MLOK Anodized Black Medium

DEMO Bilson Arms Pump Style Forward Charging Upper Assembly 6mm Arc 18 inch 1-7 Twist Cerakote Graphite Black 416R- SS

EDEMO DEMO Aero Precision AR-15 5.56x45mm NATO Complete Upper Receiver w/ No Forward Assist 10.5in 5.56 Barrel 9in M-LOK ATLAS R-ONE Handguard

EDEMO Aero Precision AR15 Assembled Upper Receiver No Forward Assist Anodized Black EDEMO3

USED Aero Precision M5E1 .308 Enhanced Upper ReceiverAnodized Black

Midwest Industries Combat Rail HD .223 Wylde 10.5inch Upper Receiver Group CORE Carbine Length 1-8 Twist 1/2x28 Threads A2 Hardcoat Anodize Black

CMMG MkG .45 ACP Banshee Fixed Ejection Upper Group Receiver 5in 1-16 Twist 0.578x28 TPI .750in Charcoal Green

CMMG 9mm Banshee Fixed Ejector Upper Group Receiver 8in 1-10 Twist 1/2 X 28 TPI 16.5in Midnight Bronze

CMMG 9mm Banshee Fixed Ejector Upper Group Receiver 8in 1-10 Twist 1/2 X 28 TPI 16.5in Coyote Tan

Radical Firearms RF Upper Assembly 10.5in 7.62x39 4150V HBAR Contour 1/10 Twist 10in RPR M-LOK A2 Flash Hider Black