Shop 4,464 Deals on Upper Receivers

USED TRYBE Defense AR-15 Pistol 10.5in Complete Upper M-LOK .223 Wylde 416R SS EDEMO1 Condition Parts Only/Salvage Defective

No Brand BC-15 5.56 NATO Right Side Charging ODG Cerakote Upper 16" Black Nitride M4 Barrel 1:7 Twist Mid-Length Gas

USED Brigade Manufacturing AR Upper Receiver Forged Black w/ Dustcover and Forward Assist EDEMO1 Used Condition Fair

USED TacFire Complete M-LOK Upper Assembly .300 Blackout 8in Type III Hard Anodized Black Large EDEMO1 Used Condition Like New

R&D Precision Upper Receiver BCG Combo 9mm Black Small

USED Aero Precision AR15 XL Assembled Upper Receiver Anodized Black EDEMO1 Used Condition Fair

USED Yankee Hill Machine Billet Stripped Upper Receiver For AR15s YHM-110-BILLET

Guntec USA AR-15 Stripped Billet Upper Receiver w/15in Ultralight Series M-Lok Handguard Flat Dark Earth

Quarter Circle 10 Complete 9mm Upper w/ PMUR 16in Barrel 1/2 - 28 15in HG FH Black

DEMO Jacob Grey Firearms Complete Upper Assembly 9mm 16in 1-10 Twist 1/2x36 Thread Black 9MM16CUA

Vltor Keymod Polylithic Upper Mid Length. Shell Deflector Only Black

Vltor Keymod Polylithic Upper Rifle. Shell Deflector Only Black

Vltor Vis Fusion 15in Carbine Keymod Deflector Only Black

Quarter Circle 10 Complete 9mm Upper w/ PMUR 10.5in Barrel 1/2 - 28 10.5in HG FH Black

KAK 358 WIN 19" BARREL, AR-10 COMPLETE UPPER, 15" MLOK

Complete AR10 Upper Receiver- 308, 12.5" Barrel- 9.8" MLOK

Complete AR15 Upper Receiver - 300 Blackout - 16" Barrel 13" - MLOK

Complete Upper Receiver 5.56 14.5" Barrel Mid Length - 13" MLOK, Pinned and weld extended A2 Flash Hider

Moriarti AR-15 .300 AAC Blackout 5 inch Upper Receiver Medium Micro Length 1-7 Twist 5/8x24 A2 Flash Hider Nitride

OP Exclusive Moriarti AR-15 Upper Receiver 300 Blackout 16in Pistol Medium M-LOK 1-7 Twist 5/8x24 Thread Diamond Cut Free-Float Handguard Triport

FM Products MIKE-15 .223 Wylde Gen 2 Build Kit 16in Intermediate 4-Position Front Charge 15.5in M-LOK Handguard A2 Flash Hider Black

DEMO Q Sugar Weasel .300 AAC Blackout 7 inch Upper Receiver 1-5 Twist 5/8x24 Clear Anodize

Ghost Firearms Upper Receiver Pistol Lower Parts Kit .300 Blackout 7.5in Pistol 4150 Light HBAR Barrel 1-8 Twist 9in M-LOK Free Float Hand Guard Flash

Ghost Firearms Upper Receiver Rifle Lower Parts Kit 5.56mm 16in Butt Stock 4150 M4 Barrel 1-7 Twist 14in M-LOK Free Float Hand Guard A2 Muzzle Device