300 Blackout Upper Receivers

Ghost Firearms Upper Receiver Pistol Lower Parts Kit .300 Blackout 10.5in Pistol 4150 Light HBAR Barrel 1-8 Twist 11in M-LOK Free Float Hand Guard

Ghost Firearms Upper Receiver Pistol Lower Parts Kit .300 Blackout 10.5in Pistol 4150 Light HBAR Barrel 1-8 Twist 11in M-LOK Free Float Hand Guard

Ghost Firearms Upper Receiver Pistol Lower Parts Kit .300 Blackout 10.5in Pistol Light HBAR Barrel 1-8 Twist 11in M-LOK Freefloat Handguard Flash Can

Ghost Firearms Upper Receiver Pistol Lower Parts Kit .300 Blackout 10.5in Pistol Light HBAR Barrel 1-8 Twist 11in M-LOK Free Float Hand Guard Flash

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

Ghost Firearms Upper Receiver Pistol Lower Parts Kit .300 Blackout 10.5in Pistol Moly Barrel 1-8 Twist 9in M-LOK Free Float Hand Guard A2 Flash Hider

Ghost Firearms Upper Receiver Pistol Lower Parts Kit .300 Blackout 10.5in Pistol Moly Steel Barrel 1-8 Twist 9in M-LOK Free Float Hand Guard A2 Flash

Ghost Firearms Upper Receiver Pistol Lower Parts Kit .300 Blackout 10.5in Pistol 4150 Moly Steel Barrel 1-8 Twist 9in M-LOK Free Float Hand Guard A2

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

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

Ghost Firearms Upper Receiver Pistol Lower Parts Kit .300 Blackout 10.5in Pistol Moly Steel Barrel 1-8 Twist M-LOK Free Float Hand Guard Burnt Bronze

Daniel Defense DDM4 PDW 300 Blackout 7 Inch Pistol Complete Upper Receiver with BCG

Bravo Company MFG (BCM) AR-15 Upper Receiver 9" 300 BLACKOUT MCMR-8

Bravo Company MFG (BCM) .300 Blackout Partial Upper Receiver w/ MCMR-5 - 7"

Bravo Company MFG (BCM) MK2 Standard 300 BLACKOUT Upper Receiver Group w/ MCMR-8 Handguard - 9"

Bootleg Mil Spec AR-15 300BLK CamLok (M-Lok) Partial Upper - 8.5"

Rock River Arms BLK0592 LAR-15M Coyote Carbine Complete Upper, 300 Blackout 16\

AR-STONER AR-15 Pistol Complete Upper Receiver 300 AAC Blackout 10.5" Heavy Barrel 9.5" M-LOK Ultralight Handguard

AR-STONER EV2 Billet AR-15 Complete Upper Receiver 300 AAC Blackout 16" Barrel Flat Dark Earth

AR-STONER EV2 Billet AR-15 Complete Upper Receiver 300 AAC Blackout 16" Barrel Black

AR-STONER EV2 Billet AR-15 Pistol Complete Upper Receiver 300 AAC Blackout 8.5" Barrel Flat Dark Earth

AR-STONER EV2 Billet AR-15 Pistol Complete Upper Receiver 300 AAC Blackout 8.5" Barrel Black