Shop 4,464 Deals on Upper Receivers

ABC RIFLE COMPANY AR 9mm Luger 16in Nitride Barrel Upper Receiver w/Custom 15in M-LOK And Charging Handle 1-10 Twist A2 Style Muzzle Brake Nitride

ABC RIFLE COMPANY AR-15 .223 Remington/5.56x45mm NATO Pistol 10in Quadrail Handguard Complete Upper Receiver w/BCG And Charging Handle Tungsten

ABC RIFLE COMPANY AR-15 7.62x39mm 10in Quadrail Handguard Complete Pistol Upper Receiver w/BCG And Charging Handle White

TRYBE Defense AR-15 Pistol 10.5in Complete Upper M-LOK .223 Wylde 416R SS

CMMG 5.7X28mm Banshee Upper Group Receiver 8in Tungsten

CMMG MkG .45 ACP Banshee Upper Group Receiver 8in Midnight Bronze

CMMG Dissent Mk4 .350 Legend 16.1in Upper Group 1-16 Twist 1/2x28 TPI 25.5.in .750in Tungsten

CMMG Dissent Mk4 6mm ARC 16.1in Upper Group 1-7.5 Twist 5/8 X 24 TPI .750in 25.5in Titanium

Wilson Combat Complete Upper Receiver Super Sniper .223 Wylde 20 inch Barrel Rifle Length 1-8 Twist M-LOK Handguard Armor-Tuff Black

Wilson Combat Upper Complete Forged 300 BLK Protector Pistol Length 16in Round Q-Comp 1-7 Twist Black Black

Lead & Steel 9mm Billet Upper Receiver Black

Guntec USA AR-15 9mm Dedicated Stripped Billet Upper Receiver Rainbow

EDEMO CMMG Mk4 Resolute Upper Receiver Group 7.62x39mm 16.1in Armor Black 76BFCB4-AB EDEMO1

Andro Corp Industries AR-15 Complete M-LOK Upper Receiver with Flash Hider Assembly w/Fmark Front Sight Base 5.56 NATO 18.75in 10.3in Barrel Govt

Wolfpack Armory Upper Receiver Side Charging Stripped Rifle Caliber Black

XTS Complete Upper Receiver w/o BCG w/ Ce Rail AR-15 .223/5.56 24.75in 16in Barrel Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride

XTS Complete Upper Receiver w/o BCG AR-15 300 BO 19.5in 10.5in Pistol 1-8 Twist 5/8x24 Thread M-LOK Bird Cage Black Nitride Finish Bronze

ArmaLite AR10 Tactical Upper Assembly Mid Length 16in Black

Guntec USA AR-15 Complete .45 ACP Upper Kit 7in Air-Lok Handguard Gen 2 Black

WMD Guns AR-15 A3/A4 Upper Receiver Forged w/M4 Feed Ramps Stripped NiB-X Marine Corp Red 1-NIBXUF-Marine Corp Red

Dark Storm Industries DS-15 AR-15 5.56x45mm NATO 16 inch Upper Receiver SOCOM Profile Carbine Length 1-9 Twist Non Threaded FDE

V Seven Harbinger 308 Upper Receiver HARB UR-ALU

Guntec USA AR Complete .308 Upper Receiver w/o Lower Parts Kit N.1 15in M-Lok Handguard .308 Gen 2 M.L.S. Stock Assembly Mid-Length .750 Gas Block

KE Arms UpperReceiver W/ Forward Assist And Dust Cover