Shop 4,464 Deals on Upper Receivers

Lead & Steel All Rounder Carbine Monobloc Upper Receiver Group 16in Mid Length 1-8 Twist M-LOK Handguard Charcoal

Guntec USA AR Complete .308 Upper Receiver w/o Lower Parts Kit N.5 15in M-Lok Handguard .308 Gen 2 M.L.S. Stock Assembly Mid-Length .750 Gas Block

DEMO CMMG DISSENT Upper Receiver 5.7x28mm 6.5in 1-9 Twist 1/2x28 Thread Zeroed Linear Compensator Charcoal Green 57BA8AE-CG

USED CMMG DISSENT Upper Receiver 5.7x28mm 6.5in 1-9 Twist 1/2x28 Thread Zeroed Linear Compensator Armor Black 57BA8AE-AB EDEMO1 Condition Parts

Dark Storm Industries DS-15 Stripped Billet Standard Upper Lower Receiver Set FDE

JARD AR Left Side Charge Upper Reciever Complete w/o Bolt Black

Quarter Circle 10 45 ACP Complete Upper Receiver w/ PMUR 5.5in Barrel .578-28 5.5in HG FH Black

Vltor Keymod Polylithic Upper Ext. Rifle. Shell Deflector Only Black

Vltor Vis Fusion Carbine 7in with Keymod And Forward Assist Black

Vltor Vis Fusion 12in Carbine Keymod Deflector Only Black

DEMO AR57 ULT Upper Receiver Assembly 12in Barrel 5.7x28mm Caliber AR57ULT-12

Guntec USA AR-15 5.56 Upper Receiver w/o Lower Parts KitN.215in Ultralight M-LOK HandguardMLS Gen 2 Stock AssemblyCarbine .750 Gas Block16in 5.56mm M4

Smith & Wesson M&p15 T Upper Receiver Assembly

USED Radical Firearms RF Upper Assembly 8.5in 300 AAC HBAR Contour 1/7 Twist 7in FGS MOE A2 Flash Hider Black EDEMO1 Condition

DEMO Faxon Firearms ARAK-21 Complete Upper Receiver 7.62x39 15 inch Aluminum Handguard 16 inch Taper Barrel Gen 2 BCG A2 Flash Hider Black FX916U

EDEMO OpticsPlanet Exclusive Moriarti AR-15/47/9/300 Billet Upper Receiver Slick Side no Forward Assist Anodized Black UPPER-SLICK EDEMO1 Used

EDEMO TRYBE Defense Complete Upper Receiver AR-15 16in M-LOK .223 Wylde 5.56x45mm NATO Black w/ Charging Handle and BCG EDEMO4

Complete AR15 Upper- Bravo Mount, 5.56, 13.9" Pin/Weld (16" OAL)

LR-308 STRIPPED UPPER RECEIVER

EDEMO Matador Arms Mat9 Upper Receiver 9mm 7.825 in 1-10 Twist 1/2x28 Threads 4150 Lightweight Nitrided Gray MAT9-U-GRY EDEMO2

Moriarti Upper Receiver with Flash Hider AR-15 .300 Blackout 10.5 inch Barrel Medium Profile Pistol Length 1x7 Twist 5/8X24 Thread M-LOK Handguard A2

OP Exclusive Moriarti AR-15 Upper Receiver Assembly 5.56x45mm 10.5in Carbine Government M-LOK 1-7 1/2x28 Diamond Cut Free-Float Handgrd A2 Flash Hider

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 Pistol Lower Parts Kit 5.56mm 10.5in Carbine 4150 M4 Barrel 1-7 Twist 11in M-LOK Free Float Hand Guard Flash Can