Shop 4,464 Deals on Upper Receivers

Sons of Liberty Gun Works East India Starter Kit CHF V2 10.5in 5.56mm Black

JL Billet Lightweight Billet Upper Receiver AR 15 Black

Sharps Rifle Company 18in 25-45 Sharps Complete Upper Assembly Light Profile Mid Length 1 in 10in 5/8in-24 Free-Floating Muzzle Thread Protector

USED Wilson Combat Upper Receiver .458 SOCOM AR-15 Standard Anodized Black TR-458UPPER EDEMO2 Used Condition Fair Scratches

FM Products FM-15 .223 Wylde 16in Mid Length Gen 2 Upper Reciever 1-8 Twist Rate 1/2x28 TPI Black

Ghost Firearms Upper Receiver Pistol Lower Parts Kit .300 Blackout 7.5in Pistol Light HBAR Barrel 1-8 Twist 9in M-LOK Free Float Hand Guard Flash Can

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

Luth-AR 24 in Bull Barrel Complete Upper Barrel Receiver Assembly Silver/Black 24

EDEMO Aero Precision Threaded Assembled Upper Receiver M5 Cerakote OD Green EDEMO1

Spikes Tactical Upper 5.56 14.5in 16in OAL CHF Midlength w/9in SAR3 Rail and Vortex Muzzle Device Black

Spikes Tactical Upper 300BLK 10in Billet w/12in SAR3 Rail

Aagil Arms Complete AR-15 5.56 NATO Upper Assembly 10.5in Barrel Length Carbine 1-8 Twist w/ 10in MLOK Anodized Black Medium

No Brand BC-15 .458 SOCOM Right Side Charging FDE Cerakote Upper 16" Parkerized Heavy Barrel 1:14 Twist Carbine

Bear Creek Arsenal BC15 5.56 NATO 16in Right Upper Receiver M4 Hammer Forged Carbine 1-7 1/2x28 Flash Hide Nitride ODG

Bear Creek Arsenal BC-15 .223 Wylde 7.5in Bolt Action Style Upper Receiver M4 Barrel 1-7 Twist 1/2x28 Flash Hider Parkerized

CBC Industries Unassembled AR-15 Pistol Kit 10.5 in 7.62X39 Black

FM Products MIKE-9 9mm Build Kit 10 inch Front Charge 4-Port Micro Brake Black

OpticsPlanet Exclusive Moriarti AR-9 Upper Receiver Assembly 9mm Luger 16in M-LOK 1-10 Twist Diamond Cut Free-Float Handguard A2 Flash Hider Anodized

Moriarti AR-15 5.56 Nato M4 Carbine Diamond Cut 12in MLok Upper Assembly A2 Black 16in

Moriarti AR-15 .300 AAC Blackout 6 inch Upper Receiver Medium Pistol Length 1-7 Twist 5/8x24 A2 Flash Hider Nitride Black

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

Vltor Modular Upper Receiver with Bolt Assist and Shell Deflector Flat Dark Earth

Ghost Firearms Upper Receiver Pistol Lower Parts Kit 5.56mm 7.5in Pistol 4150 Chrome Moly Steel Barrel 1-7 Twist 7in M-LOK Free Float Hand Guard A2

Ghost Firearms Elite Complete Upper Receiver .300 Blackout 7.5in Pistol Length 4150 Light HBAR Barrel 1-8 Twist 7in M-LOK Free Float Hand Guard A2