GHK M4 Polished bolt carrier Modify Flat Hop Stock internals but missing full auto sear 4 Co2 mags Also includes Magpul CTR stock (missing butt plate and has a crack in it. Can include basic crane stock), Magpul K2 grip VFC MLOK rail included Trinity Force short dot included as well Local pickup in Southern California preferred but will ship if necessary. NO TRADES OR PARTIAL SALES.