Bushmaster rifles have quickly become the choice of AR-15 buyers due to their accuracy, reliability, and value. The heavy barrel, with chrome-lined bore and chamber, offers exceptional accuracy for its length and is externally manganese phosphate-finished for complete protection against corrosion and rust. Forged, lightweight 7075T6 aircraft quality aluminum receivers have all M16A2 design improvements including cartridge case deflector and last round bolt hold-open. The Optics-Ready XM-15 features an M4 profile barrel that is chrome-lined in both bore and chamber and terminates in a birgage flash supressor. A Picatinny mounting rail with two riser blocks makes scope and accessory mounting easy and a heavy oval handguard fits comfortably in bare or gloved hands. The California Compliant model comes with a bullet button and a 10-round magazine.