There is nothing more crucial to the performance of your AR-10 than the bolt carrier group. Made to MIL-SPEC and finished with superior quality nitride finish that protects against corrosion and heat, our BCG wont t let you down. In order to ensure that it will run beautifully in your AR-10, each bolt carrier group under goes high pressure testing (HPT), and magnetic particle inspection (MPI). Whether you are 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.