5.56x45mm NATO Upper Receivers

Ghost Firearms Complete Upper Receiver Pistol Lower Parts Kit 5.56mm 7.5in Pistol 4150 M4 Barrel 1-7 Twist 9in M-LOK Free Float Hand Guard Flash Can

Ghost Firearms Complete Upper Receiver Pistol Lower Parts Kit 5.56mm 7.5in Pistol Length 4150 M4 Barrel 1-7 Twist 9in M-LOK Free Float Hand Guard

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

Ghost Firearms Vital Upper Receiver Rifle Lower Parts Kit 5.56mm 16in Carbine 4150 M4 Barrel 1-7 Twist 11in M-LOK Free Float Hand Guard A2 Birdcage

Ghost Firearms Upper Receiver Rifle Lower Parts Kit 5.56mm 16in Carbine 4150 Chrome Moly Steel Barrel 1-7 Twist 14in M-LOK Free Float Hand Guard A2

Ghost Firearms Complete Upper Receiver Pistol Lower Parts Kit 5.56mm 10.5in Carbine 4150 M4 Barrel 1-7 Twist 11in M-LOK Free Float Hand Guard Flash

Ghost Firearms Upper Receiver Pistol Lower Parts Kit 5.56mm 10.5in Carbine 4150 M4 Barrel 1-7 Twist 11in M-LOK Free Float Hand Guard Flash Can

Ghost Firearms Complete Upper Receiver Pistol Lower Parts Kit 5.56mm 10.5in Carbine 4150 M4 Barrel 1-7 Twist 11in M-LOK Free Float Hand Guard Flash

Ghost Firearms Upper Receiver Pistol Lower Parts Kit 5.56mm/.223 10.5in Carbine Moly Barrel 1-7 Twist 9in M-LOK Free Float Hand Guard A2 Flash Hider

Ghost Firearms Upper Receiver Pistol Lower Parts Kit 5.56mm/.223 10.5in Carbine Moly Barrel 1-7 Twist 9in M-LOK Free Float Hand Guard A2 Flash Hider

Mike-102 Gen 2 Complete Uppers - Gen 2 Complete Upper 9'''' Pistol Length W/Blast Diverter

Mike-102 Gen 2 Complete Uppers - Gen 2 Complete Upper 16'''' Intermediate Gas W/A2 Flash Hider

Foxtrot Mike Products Mike-156 16" 5.56 NATO G2 Upper

Forward Controls Design URF-F AR-15 Forged Upper Receiver

Fortis MFG AR-15 Billet Carbon Fiber Dust Cover

FN America 16" 5.56 NATO M-LOK Midlength 1:7 Complete Upper

Daniel Defense AR-15 DDM4V7 SLW URG Barreled Upper Receiver 5.56x45mm 14.5" Pinned Barrel with Iron Sights

Ar-15 Le6960-Ccu Upper Receiver 5.56 M-Lok - Le6960-Ccu Upper Receiver 5.56 M-Lok Black

M4 Upper Receiver 5.56 Socom Barrel - M4 Socom Upper Group 14.5in Stripped

Centurion Arms CM4 5.56 Forged Upper Receiver

Bushmaster XM15-E2S 223/5.56mm Police Trade-in Upper Receivers

Bushmaster XM-15 Complete 5.56x45mm Upper Receiver 16\" Barrel - 00-400003-BLK

Bravo Company MFG (BCM) AR-15 BFH Upper Receiver Group - 16"

Bravo Company MFG (BCM) AR-15 Upper Receiver SS410 18 Rifle MCMR 15