AB Arms Arms Company represents and stands for American Built with Honor, Service and Integrity as their motto. This particular Ar-15 free float hand guard is from the Pro series. It features a full length picatinny 1913 rail along with the M-LOK modular attachment system. The hand guard is made from 6061-T6 aluminum and features a hard coat anodized finish. This hand guard comes with the necessary parts for mounting and best of all it is made right here in the USA.