Shop 4,464 Deals on Upper Receivers

Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Receiver Group Slick Side 13.9in Mid Blackout

Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Receiver Group Slick Side 13.9in Mid Grey

Del-Ton Dissipator Pre-Ban Heavy Profile Rifle Kit 16in Standard/Rifle

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

LMT MRP-L M-LOK AR-15 Upper Receiver - 9.25"

VLTOR MUR Modular Upper Receiver W/O Bolt Assist - Black

Ghost Firearms Vital Upper Receiver 5.56x45 NATO 10.5 inch Carbine Length 4150 M4 Barrel 1-7 Twist 9 inch M-LOK Free Float Hand Guard A2 Birdcage

SLR Rifleworks Billet Upper SLR 556

Aero Precision M5 Complete Upper Receiver 16in .308 SS Mid Barrel w/ATLAS S-ONE 12in M-LOK Handguard Anodized Black

Radical Firearms RF Upper Assembly 7.5in 5.56 M4 Contour 1/7 Twist 7in RPR M-LOK A2 Flash Hider Black

Blackout Defense Complete Dual Taper Lock .300 AAC Upper Receiver Group Forward Assist 9in Pistol Black

Rock River Arms AR-15 Varmint A4 Upper Receiver Assembly 223 Wylde 20" Stainless Steel Barrel M-LOK Handguard Black

Evolve Weapons Systems Assembled Upper Receiver 14.5in Mid Length Gas System M-LOK Handguard Black

Chiappa Firearms M4-22 Complete Upper .22 LR 16 Barrel 10-Rounds 2 Magazines

Aero Precision M4E1 Complete Upper Receiver AR-15 10.5 in Rifle Length Barrel 9 in Quad Rail Handguard No BCH/CH Anodized Black

Ballistic Advantage Logic Series Barrel 5.56x45 13.9 inch Hanson Midlength 1-7 Twist 1/2 x 28 Thread Anodized Black

Matrix Arms 9mm Dual Side Charging Upper & BCG Gen 2

Guntec Ar15 Stripped Billet Upper Receiver Kit Black GT-UPPER-KIT

Bushmaster A1 Stripped Upper Receiver XM15 Grey

Soft-Rifle-Case Gun-Range-Bags Shooting-Hunting Sports-Storage - with Padded Transport 5 Pouches Adjustable Shoulder Strap Black 38"

Ghost Firearms Vital Complete Upper Receiver .300 Blackout 10.5in Pistol Length 4150 Light HBAR Barrel 1-8 Twist 9in M-LOK Free Float Hand Guard A2

Aero Precision M4E1-T PRO CHF M4 5.56mm 13.9 inch Complete Upper Receiver Hanson Mid Length 1-7 Twist A2 Birdcage Anodized Black

Blackout Defense Zero Trigger MCX 4.5lb Curved Black

Wilson Combat AR-15 Lightweight Stripped Billet Upper Receiver