AR-556 WITH FREE FLOAT HANDGUARD 5.56X45 NATO SEMI-AUTO RIFLE FEATURES: 11" aluminum handguard is free-floated for accuracy and features MagpulA(R) M-LOKA(R) accessory attachment slots along the 3:00, 6:00 and 9:00 positions with additional slots on the angled faces near the muzzle. Flat top upper receiver features a Picatinny rail for easy attachment of magnified optic, red dot or open sights. Made from 7075-T6 hard-coat anodized aluminum forgings, shot-peened and proof-tested 9310 steel bolt, and 8620 steel bolt carrier. The inside diameter of the carrier and gas key are chrome plated and the key is staked for longevity. Single-stage trigger provide Mfg: Ruger