Electronic Burst of Steel (EBOS) rifle Uses an 88-gram CO2 cartridge Semiauto 24-rd mag, 400-rd reservoir! Electronic trigger control Burst mode for 2, 4 or 8 rounds at a time! Tactical foregrip Weaver/Picatinny rails Adjustable front sight Adjustable rear sight Built-in (non-removable) mag If you use the bulk-fill CO2 adapter, the buttstock won't fit on the gun