Shop 4,464 Deals on Upper Receivers

OP Exclusive Moriarti AR-15 Upper Receiver Assembly 5.56x45mm NATO 16in Mid M-LOK 1-7 Twist 1/2x28 Pinned Gas Block Diamond Cut Free-Float Handgrd A2

DEMO Aero Precision M5E1 Complete Upper Reciever .308 20in Rifle Barrel 1-10 Twist 5/8x24 Thread Free-Float Handguard Anodized Black

Aagil Arms Ted Nugent's Signature Series .223 Wylde AR-15 Complete Upper Receiver Assembly w/ 15in Zebra Strip Cerakote

Ghost Firearms Upper Receiver Pistol Lower Parts Kit 7.62X39 10.5in Carbine Light HBAR Barrel 1-10 Twist 9in M-LOK Free Float Hand Guard A2 Birdcage

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

USED Matador Arms Mat9 Upper Receiver 9mm 7.825 in 1-10 Twist 1/2x28 Threads 4150 Lightweight Nitrided FDE MAT9-U-FDE EDEMO2 Condition Parts

USED Matador Arms Mat9 Upper Receiver 9mm 7.825 in 1-10 Twist 1/2x28 Threads 4150 Lightweight Nitrided Black MAT9-U-BLK EDEMO2 Used Condition Like New

OpticsPlanet Exclusive Moriarti AR-9 Upper Receiver Assembly 9mm Luger 10.5in M-LOK 1-10 Twist Diamond Cut Free-Float Handguard A2 Flash Hider

OpticsPlanet Exclusive Moriarti AR-9 Complete Upper Receiver Complete Upper Receiver 9mm Luger 8.3 inch 1-10 Twist MLOK Handguard Anodized Black Black

USED Dark Storm Industries DS-15 Complete Upper 7.5" Hailstorm 5.56 Threaded Black 5.56 DSI-UC5-HLS-T5-BLK EDEMO1 Condition Parts Only/Salvage

DEMO CMMG 9mm Banshee Upper Group Receiver 5in 1-10 Twist 1/2 X 28 TPI 13.7in Tungsten 99B17FD-TNG

USED Bushmaster A4 Stripped Upper Receiver Black

Vltor Vis Fusion 7in Carbine Keymod Deflector Only Black

Vltor Extended Mid-Length Upper Receiver with Shell Deflector Only Black

Quarter Circle 10 Side Charging Complete 9mm Upper Receiver Assembly 5.5in Barrel Black QC-CU-PSCU-G-9-5.5 Inch

EDEMO LaRue Tactical Upper Reciever Complete .308 Keymod Upper 18 in Barrel Urban Dark Earth Medium DPMS Cut EDEMO1

Grid Defense Complete Upper Receiver .300 Blackout 7.5 inch Pistol Length 4150 Light HBAR Barrel 1-8 Twist 9 inch Octagon M-LOK Hand Guard Dimpled

DEMO Rock River Arms Completed Upper Receiver X-1 .308/7.62x51mm 18 Inch Barrel 1-10 Twist 5/8-24 Threat Free-Float Handguard Brake Tan

EDEMO Spikes Tactical M4 Flat Top Upper W/Out Provision for Forward Assist or door SFT56M4 EDEMO2

USED TRYBE Defense AR-15 Semi-Complete Upper M-LOK w/o BCG or Charging Handle 16in .300 Blackout 4140 CMV Black EDEMO1 Used Condition

ZEV Technologies MEGA MATEN MML Billet Stripped Upper Receiver w/16'' M-LOK Handguard Black

USED EDEMO TacFire Complete Upper Assembly .45 ACP 7in Type III Hard Anodized Black Large BU-45ACP-7 EDEMO1 EDEMO1 Used Condition Good Inspect and

EDEMO San Tan Tactical Pillar Lite Billet Upper Receiver Black STT-15 PILLAR LITE UPPER EDEMO1

DEMO Radical Firearms Upper Assembly 16 inch 300 AAC HBAR Contour 12 inch FQR w/BCG and CH Black