ADAMS ARMS CARBINE-LENGTH GAS PISTON SYSTEM - LITE KIT w/0.625" DIA. LITE GAS BLOCK **NO handguard or rail system** •Self-cleaning, short-stroke free-floating piston system features adj. gas settings, resists corrosion, expels carbon/gases forward & away from operator, & eliminates harmonic barrel transfer, flash signature & super sonic crack •1-pc. bolt carrier w/integral piston strike face •Kit includes gas block w/(3) settings, gas plug, upper receiver bushing, bushing installation rod, bolt spring, drive rod w/bushing & spring, & installation DVD •Wt.: 2 lbs.