TacFire AR Build Kit Pistol 300 BLK Black Parkerized Steel delivers unmatched performance for custom AR pistol builds. Designed for versatility and durability this kit includes a .300 AAC 10.5" parkerized barrel .308 spiral fluted flash can with crush washer and ultra-slim 7" M-LOK free float handguard for precision and sleek handling. Featuring a stripped billet upper receiver with M4 feed ramps an MPI-tested nitride bolt carrier group and a low-profile gas block it ensures reliable and efficient operation every time. Complete with a mil-spec charging handle pistol-length gas tube and lower parts kit this USA-made build is tailored for high-performance AR pistols.