u/KohhKohh

I’m not supper familiar with the internal workings of gbb airsoft rifles, but I wanted to get essentially the minimum parts required to have a functioning gbb m4. Back when I played airsoft more often, I remembered the KWA has a detailed parts list page, and I’m just wondering what all I need, given I install my own Handguard, pistol grip, stock, and whatnot.