ADAMS ARMS BASE RIFLE w/MID-LENGTH HANDGUARD GOV'T. CONTOUR BARREL & A2 BIRDCAGE •Semi-auto •Self-cleaning short-stroke free-floating Adams Arms Gas Piston System features adj. gas settings resists corrosion expels carbon/gases forward & away from operator & eliminates harmonic barrel transfer flash signature & super sonic crack •Ion bonded 1-pc. bolt carrier w/integral piston strike face •Mil-Spec forged 7075-T6 up-per & lower receivers w/Type III Class 2 hardcoat anodized finish •A4 flat-top upper receiver features 1913 Picatinny rail M4 feed ramps & laser-engraved T-markings •Beveled mag well •Machined chevrons •Melonited drive rod gas plug & railed gas block •4150 Series ChromeMoly steel VooDoo threaded (1/2”-28 TPI) barrel w/muzzle device & black Nitride anti-corrosive LifeCoat Melonite finish •Twist: 1:7” twist •No sights •M4 modified handguard w/round cap •Black Mil-Spec 6-position buffer tube w/retractable std. A2 carbine stock & A2 pistol grip •Includes (1) GI aluminum mag. •Limited Lifetime Warranty •OAL: 32.5” collapsed 37.25” extended •Wt.: apx. 6.3 lbs. Cal.: 5.45x39mm - Cap.: 30 - Brl.: 16"