Shop 4,464 Deals on Upper Receivers

USED Del-Ton Pre-Ban M4 Carbine Rifle Kit 5.56x45mm NATO 16 in 1-9 Twist Matte Black RKT100 EDEMO1 Used Condition Fair Missing Item

Vltor Modular Upper Receiver with Bolt Assist and Shell Deflector Foliage Green

Vltor Modular Upper Receiver 223 Rem/5.56 NATO With Forward Assist Black

JP Enterprises Jp-15/22R Upper Assembly Thread Protector Black and Silver

OP Exclusive Moriarti AR-15 Upper Receiver 300 Blackout 10.5in Pistol Medium M-LOK 1-7 Twist 5/8x24 Thread Diamond Cut Free-Float Handguard Slanted

FM Products MIKE-9 9mm Build Kit 16 inch Mil-Spec Rear Charge 4-Port Micro Brake Black

FM Products MIKE-45 .45 ACP Complete Upper Receiver Kit 16 inch Barrel Front Charge Black

FM Products Mike-15 .223 Wylde Gen 2 Complete Upper Receiver 17.75 inch 9 inch Barrel Pistol Length 1-8 Twist 1/2x28 Thread Free-Float Nitride Black

EDEMO Radical Firearms AR-15 RF Upper Assembly 16in 7.62x39 4150V HBAR Contour 1/10 Twist 15in FCR M-LOK A2 Flash Hider Black

Bear Creek Arsenal BC15 12.7x42 18in Upper Receiver Heavy Mid-Length 1-20 49/64x20 Flash Hide Parkerized FDE

USED TacFire DPMS Complete Upper Assembly Low Profile .308 Winchester 16in Type III Hard Anodized Black Large EDEMO1 Used Condition Fair

EDEMO Aero Precision EPC-9 - 9/40 Enhanced Upper Receiver w/ LRBHO Anodized Black EDEMO1

EDEMO 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 Anodized

Guntec USA AR-15 5.56 Complete Upper Receiver Combo Kit Black

Ghost Firearms Elite Complete Upper Receiver .300 Blackout 10.5in Pistol Length 4150 Light HBAR Barrel 1-8 Twist 9in M-LOK Free Float Hand Guard A2

EDEMO CMMG DISSENT Upper Receiver 9mm 10.5in 1-10 Twist 1/2x28 Thread Zeroed Linear Compensator Sniper Grey 99B80E4-SG EDEMO1

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

Aagil Arms Complete AR-15 .350 Legend Upper Assembly 16in Barrel Length Carbine 1-16 Twist w/ 15in M-Lok Anodized Black Medium

Aagil Arms Complete AR-15 .223 Wylde Upper Assembly 16in Barrel Length Carbine 1-7 Twist w/ 15in Key Mod Anodized Black Medium

Aero Precision M4E1 Complete Upper 20in 6.5 Grendel Stainless Steel Barrel EM15 Gen 2 HG FDE Cerakote

Aero Precision Complete Upper Receiver M4E1-T 5.56x45mm NATO 16in Government Carbine Length 1 in 7 1/2 x 28 12.7in A2 Flash Hider Cerakote FDE

Stern Defense SD 16.1in MOD4 MLOK .40SW Upper Receiver Assembly 15in M-LOK Handguard .578-28 TPI 1-16 Twist Rate Black 015SD15INMD4ML16.1INBR40SWKK

Blackout Defense Complete Dual Taper Lock .300 AAC Upper Receiver Group Slick Side 14.5in Pistol Green URGDTL300BLK14.5SLKGRN

Blackout Defense Complete Dual Taper Lock .300 AAC Upper Receiver Group Slick Side 14.5in Pistol Black URGDTL300BLK14.5SLKBLK