This kit contains the two most crucial components that affect the performance of your AR-15. The bolt carrier group in this kit is made to MIL-SPEC and finished with superior quality nitride finish that protects against corrosion and heat, our BCG won’t let you down. In order to ensure that it will run beautifully in your AR-15, each bolt carrier group under goes high pressure testing (HPT), and magnetic particle inspection (MPI). Whether you’re looking for a drop-in Mil-Spec quality replacement for your current AR or are going for a new build, this bolt carrier group provides you with the reliability and performance you expect from a first-rate product. The second component that makes up this kit is the charging handle, which not only assists in chambering a round but is your main tool to clear a round that won’t eject cleanly. The 7075-T6 aluminum design results in a rugged and capable charging handle for your AR-15.