Shop 4,481 Deals on Upper Receivers

Bear Creek Arsenal BC-15 .223 Wylde 20in Bolt Action Style Upper Receiver Heavy 1-8 1/2x28 Flash Hider 416R Black

Bear Creek Arsenal BC-15 5.56 NATO 16in Bolt Action Style Upper Receiver M4 Barrel 1-7 Twist 1/2x28 Flash Hider Cold Hammer Forged

Moriarti Upper Receiver with Flash Hider AR-15 5.56 Nato 10.5 inch Barrel Government Contour Carbine Length 1x7 Twist 1/2X28 Thread M-LOK Handguard A2

Ghost Firearms Elite Complete Upper Receiver 5.56x45 NATO 16in Carbine Length 4150 M4 Barrel 1-7 Twist 14in M-LOK Free Float Hand Guard A2 Birdcage

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

Grid Defense Complete Upper Receiver 7.62x39 10.5 inch Carbine Length 4150 Steel Light HBAR Barrel 1-10 Twist A2 Flash Hider Flat Dark Earth

FM Products FM-9 AR 9x19mm Parabellum Rear Charging Upper Receiver 5in Barrel 5in Handguard w/ Blast Diffuser Black

FM Products FM-9 AR 9x19mm Parabellum Rear Charging Upper Receiver 5in Barrel 4in Handguard w/ Blast Diffuser Black

Aero Precision M5 Complete Upper Receiver 16in .308 Mid SS Barrel w/ATLAS R-ONE 12in M-LOK Handguard Anodized Flat Dark Earth

ABC RIFLE COMPANY AR-15 7.62x39mm Micro Pistol Build 5in Barrel 4in M-LOK Handguard Upper Receiver Red

Tiger Rock Low Profile Upper Receiver AR-10/LR-308 Anodized Black Black Small

Tiger Rock AR-15/47/9/300 Stripped Upper Receiver Cerakote Burnt Bronze Medium

Spikes Tactical Upper 5.56 18in LW SPR w/13.2in BAR2 Rail

Spikes Tactical Upper 5.56 16in CHF Midlength w/ 9in BAR2 Rail

Spikes Tactical Upper 5.56 16in CHF Midlength w/ 10in BAR2 Rail

CMMG Dissent Mk4 6.5mm Grendel 16.1in Upper Group 1-8 Twist .750in 25.5in 5/8 X 24 TPI Coyote Tan

CMMG DISSENT Mk4 5.56x45mm NATO 10.5in Upper Receiver 1-7 Twist .750in 1/2 X 28 TPI Titanium

CMMG DISSENT Upper Receiver Mk4 300BLK 6.5in 1-7 Twist 5/8x24 Thread Zeroed Linear Compensator Tungsten

CMMG 9mm Banshee Upper Group Receiver 8in 1/2x28 Charcoal Green

Spikes Tactical Upper 5.56 14.5in 16in OAL CHF Midlength w/13.2in SAR3 Rail w/ Vortex

Aero Precision M4E1 Threaded Complete Upper 7.5in 5.56 Barrel ATLAS R-ONE 7in M-LOK HG FDE Cerakote

Aero Precision Complete Upper Receiver M4E1-E 16in .223 Wylde Fluted Barrel EM-15 Handguard Gen 2 Cerakote Flat Dark Earth

Stag Arms AR-10 Marksman Left Hand Upper Receiver 308 Win 18in Barrel HBAR-CMV Profile 1-10 Twist 5/8X24 Thread VG6 Gamma Black

Rainier Arms Ruc Pro Mk2 5.56 Nato Partial Upper Receiver Black 12.5 in