RUGER® AR-556™ •Semi-auto •M4-style direct impingement Modern Sporting Rifle •Forged 7075-T6 aluminum upper & lower receivers •Cold hammer forged chrome-moly steel barrel w/M4 feed ramp cuts •Thread pattern: 1/2"-28 •Twist: 1:8" RH •Mid-length, flat-top M4 design is fully configured with a Ruger® Rapid Deploy folding rear sight, milled F-height gas block & post front sight, forward assist, dust cover, and brass deflector •Telescoping, black synthetic, six-position stock •Improved trigger-reach grip •Enlarged trigger guard •Type III hard coat anodized finish •Includes one 30 rnd. Magpul® PMag® •OAL: 32.25''-35.50'' •Wt.: 6.50 lbs. •Cal.: 5.56 NATO •Cap.: 30 •Brl.: 16.10"