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DPMS Kitty Kat DP51655170308 AR-15 Compatible Upper 300 Blackout 7.5" Barrel Black Nitride Finish.
CMMG 30B0E67AB Dissent MK4 300 Blackout 6.50", Left Side Charging Handle, Armor Black, OEM Zeroed Linear Comp, 4.60
Q LLC Sugar Weasel AR-15 Upper, 300 Blackout, 13" Barrel, Black Finish, MPN ACCSW30013INUPPER.
TacFire BU-300-8 AR-15 Complete Upper .300 AAC Blackout 8" Barrel Black Finish
TacFire BU-300-16 AR-15 Complete Upper, .300 AAC Blackout, 16" Black Nitride Barrel, Black Finish
DPMS Kitty Kat C7 AR Upper 300 Blackout 7.5" Black Nitride/Hard Anodized Finish.
Lead & Steel LS300-14.5 14.5" 300 Blackout Barrel 4150 Chrome Moly Vanadium QPQ Nitride AR-15 Compatible
CMMG 30BC239AB Dissent MK4 300 Blackout 10.50", Left Side Charging Handle, Armor Black, OEM Zeroed Linear Comp, 9.6
CMMG 30BC40AMB Resolute MK4 300 Blackout 16.10", Midnight Bronze, M-LOK Free-Float Handguard for AR-Platform (No BC
Aero Precision M4E1 Enhanced 16" .300 Blackout Complete Upper Receiver with 15" Enhanced M-LOK Handguard - Cer
Aero Precision M4E1 Threaded 16" .300 Blackout Complete Upper Receiver with 16" ATLAS R-ONE Handguard - Anodiz
Aero Precision M4E1 Threaded 16" .300 Blackout Complete Upper Receiver with 15" ATLAS S-ONE Handguard - Cerako
Aero Precision M4E1 Threaded 16" .300 Blackout Complete Upper Receiver with 15" ATLAS S-ONE Handguard - Anodiz
Aero Precision M4E1 Enhanced 16" .300 Blackout Complete Upper Receiver with 15" Enhanced M-LOK Handguard - Ano