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Ballistic Advantage Modern Series 10.5" .300 Blackout, Pistol Length, 1:7 Barrel - BABL300008M
TacFire BU-300-8 AR-15 Complete Upper .300 AAC Blackout 8" Barrel Black Finish
Rosco Manufacturing Bloodline BL-16-HB-300BLK-8-P 16" Barrel 300 Blackout 4150 CMV Nitride AR-15 Compatible
DPMS Kitty Kat DP51655170308 AR-15 Compatible Upper 300 Blackout 7.5" Barrel Black Nitride Finish.
Q LLC Sugar Weasel AR-15 Upper, 300 Blackout, 13" Barrel, Black Finish, MPN ACCSW30013INUPPER.
TacFire AR Barrel BAR30018N 16" .300 Blackout Black Nitride AR-15 Compatible
Aero Precision 16" .300 Blackout CMV Barrel, Pistol Length - APRH100173C
TacFire BAR3001810N AR Barrel 10.50" 300 Blackout Nitride Steel AR-15
Q LLC Honey Badger 7" 300 Blackout 1:5 Twist Stainless Steel Barrel - BARRELHB3007
CMMG 30B0E67AB Dissent MK4 300 Blackout 6.50", Left Side Charging Handle, Armor Black, OEM Zeroed Linear Comp, 4.60