Shop 4,464 Deals on Upper Receivers

ABC RIFLE COMPANY AR-15 .223 5.56 Complete Build 16in Barrel 15in Lightweight Hybrid M-LOK Handguard Upper Receiver 1-10 Twist 1/2x28 A2 Style Muzzle

ABC RIFLE COMPANY AR-15 .223 Remington/5.56x45mm NATO Pistol 7.5in Barrel M-LOK Handguard Complete Pistol Receiver w/BCG And Charging Handle Flat Dark

Brenton USA Upper Receiver Scout 300 HAM'R 18in Barrel 5/8x24 Thread 1-15 Twist Midnight MarbleKote Midnight MarbleKote

Brenton USA Upper Receiver Scout .350 Legend 18in Barrel 9/16x24 Thread 1-16 Twist Snow MarbleKote Snow MarbleKote

Brenton USA Upper Receiver Tracker .450 Bushmaster 22in Barrel 11/16x24 Thread 1-24 Twist Harvest MarbleKote Harvest MarbleKote

Unique-ARs Original We The People Complete Upper Receiver Cerakote Armor Black/Anodize Black

Wilson Combat Upper Complete Forged 5.56 NATO Recon Mid Length 16in Round Q-Comp 1-8 Twist Black Black

American Defense Manufacturing 300 Out 10.5 Inch Barrel M-Lok Rail Upper Reciever Flat Dark Earth 10.5 in

Stag Arms AR-10 Stag 10 Upper Receiver Assembly .210 DPMS High Profile Left Hand Type 3 Hard Coat Anodized Black

Stag Arms AR-10 Long Range Right Hand Upper Receiver 6.5 Creedmore 24in Barrel NJ Compliant HBAR-CMV Profile 1-10 Twist 5/8X24 Thread VG6 Gamma Black

Stag Arms AR-10 Tactical Left Hand Upper Receiver 308 Win 16in Barrel TAC-GOV-CMV Profile 1-10 Twist 5/8X24 Thread VG6 Gamma FDE

Aero Precision AR15 No FA Complete Upper 16in .223 Wylde Fluted Barrel Mid-Length 15in M-LOK ATLAS R-ONE HG Anodized Black

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 Anodized Black

Aero Precision M4E1-T Complete Upper Receiver Threaded 5.56x45mm Mid Pencil 14.7in Barrel ATLAS S-ONE 12in Handguard M-LOK Anodized Black

F5 MFG AR-15 Billet Upper Receiver Black

Sons of Liberty Gun Works Half Complete Upper Receiver M4-89 5.56mm 14.5in 13.75in Combat Barrel M89 Rail P/W NOX9 Flash Hider No BCG or CH Black

XTS Complete Upper Receiver w/o BCG w/ 12in Rail AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish

XTS Complete Upper Receiver w/o BCG w/ 12in Rail AR-15 300 BO 24.75in 16in Barrel Carbine 1-8 Twist 5/8x24 Thread M-LOK Bird Cage Black Nitride Finish

XTS Complete Upper Receiver w/o BCG AR-15 300 BO 17.5in 8.5in Pistol 1-8 Twist 5/8x24 Thread M-LOK Bird Cage Black Nitride Finish OD Green

Lead & Steel 5.56mm Billet Left Handed Upper Receiver Black

Bushmaster A4 Complete Upper Receiver Black

Sons of Liberty Gun Works 13.9 in Patrol SL Upper Receiver Group w/NOX mount FSB 5.56mm Black

EDEMO ODIN Works Billet Upper Receiver AR-15 9mm Low Profile Matte Black UPPER-BILLET-9MM EDEMO5 Used Condition Like New

USED Jacob Grey Firearms Ultralight Complete Upper Assembly 5.56 NATO 13in Black 556N13ULCUA