ADAMS ARMS RIFLE-LENGTH GAS PISTON SYSTEM - STANDARD KIT w/M4 MODIFIED HANDGUARD & 0.750" DIA. PICATINNY GAS BLOCK •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.
