Shop 4,464 Deals on Upper Receivers

Brenton USA Upper Receiver Tracker 6mm ARC 22in Barrel 5/8x24 Thread 1-7.5 Twist Snow MarbleKote Snow MarbleKote

Brenton USA Upper Receiver Scout 6.8 SPC 18in Barrel 5/8x24 Thread 1-10 Twist Snow MarbleKote Snow MarbleKote

USED Daniel Defense DDM4V7 Pro URG 5.56 1-7 S2W LPG MFR XS Rail 15.0 DD Muzzle Climb Mitigator Gen II BCM Mod 4 CH Upper Receiver Complete 18in

New Frontier C-5 9mm Slick Side Billet Upper Receiver

WMD Guns AR-15 A3/A4 Upper Receiver Forged w/M4 Feed Ramps NiB-X Firehouse Red 1-NIBXURF-Firehouse Red

USED XTS Complete Upper Receiver w/o BCG AR-15 223/5.56 16.5in 7.5in Pistol 1-7 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish Red

Range Tool AR15 Forged Upper Receiver 5.56x45mm NATO .300 AAC Blackout 6.8 SPC Mil-Spec HardCoat White

USED TRYBE Defense Complete Upper Receiver AR-15 5.56x45mm NATO 16in 5R Barrel 1-7 Twist 15in M-LOK Rail A2 Flash Hider BCG and CH Nitride Black

EDEMO Aero Precision RM10.3 M4E1-T Complete Upper w/11.5in 5.56 Barrel FDE EDEMO1

New Frontier Armory New Frontier C10 Upper Recvr Ar10 Side Charger Billet Black

No Brand BC-15 6mm Arc Right Side Charging Tungsten Cerakote Upper 18" Parkerized Heavy Barrel Mid-length Gas System

No Brand BC-10 .308 Right Side Charging Tungsten Cerakote Upper 16" Parkerized Heavy Barrel 1:10 Twist Mid-Length Gas

Black Dawn 16-inch 5.56 Complete Upper w/BCG/ChrgHandl

USED TacFire Complete Upper Assembly 9mm 7in Black Large BU-9MM-7

Bear Creek Arsenal BC-15 5.56 NATO 20in Bolt Action Style Upper Receiver Heavy Barrel 1-7 Twist 1/2x28 Flash Hider Parkerized

Bear Creek Arsenal BC-15 .300 Blackout 7.5in Bolt Action Style Upper Receiver Heavy Barrel 1-8 Twist 5/8x24 Flash Hider Parkerized

ZEV Technologies MEGA AR15 MML Billet Stripped Upper Receiver w/ 14'' M-LOK Handguard Black

EDEMO Stag Arms Stag 15L LEO Upper 16in .223/5.56mm NATO 4150 Steel Government Profile Handguard w/ Picatinny Quad Rails 1-7 Twist Carbine Length A2

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

EDEMO Ghost Firearms Complete Upper Receiver Pistol Lower Parts Kit 5.56mm 7.5in Pistol Length 4150 M4 Barrel 1-7 Twist 9in M-LOK Free Float Hand

Ghost Firearms Upper Receiver Pistol Lower Parts Kit .300 Blackout 7.5in Pistol 4150 Moly Steel Barrel 1-8 Twist 7in M-LOK Free Float Hand Guard A2

Ghost Firearms Elite Complete Barreled Upper Receiver Tactical Grape

Ghost Firearms Vital Upper Receiver Rifle Lower Parts Kit 5.56mm 16in Carbine 4150 M4 Barrel 1-7 Twist 11in M-LOK Free Float Hand Guard A2 Birdcage

Ghost Firearms Upper Receiver Rifle Lower Parts Kit 9mm 9x19 Para 16in Carbine Light HBAR Barrel 1-10 Twist 14in M-LOK Free Float Hand Guard A2 Muzzle