Tacfire 300 AAC 7.5 PSTL BUILD KIT. 5inch UNASSEMBLED .300 AAC PISTOL BUILD KIT Specifications for Tacfire PK300LPK-7 300 AAC 7.5 PSTL BUILD KIT PK300LPK7: Manufacturer: TacFire Caliber: .300 AAC Blackout Condition: New Charging Handle Included: MIL-SPEC Barrel Twist Rate: 1-7 Package Contents: Tacfire PK300LPK-7 300 AAC 7.5 PSTL BUILD KIT PK300LPK7 The Tacfire PK300LPK-7 300 AAC 7.5 PSTL BUILD KIT PK300LPK7 is a quality addition to the TacFire lineup. For more great deals on AR15 Lower Parts by TacFire please browse our Tacfire Gun Parts page. Tacfire PK300LPK-7 300 AAC 7.5 PSTL BUILD KIT PK300LPK7