I bought all my parts from an online retailer. I have the tapco retainer plate, g2 trigger group, pistol grip, and fixed buttstock. I also bought the bullet guide. I'm going to buy a drill press too. Anyway I've disassembled my rifle and I'm having trouble with removing the gas tube. I got the lever to move toward the barrel all the way, but I can't pull the damn thing out. thanks for reading this.