Did this one for a buddy of mine. Mossberg 500 12ga. He had a Butler Creek stainless folding stock for it. I just couldn't make it work! I blasted everything & Duracoated the reciever & trigger group. Stripped & Duracoated the folding stock & slow rust blued the mag tube (He bought a new factory barrel 18.5" barrel), ect... Top receiver (pistol grip) safety just SUX (Id rather have the side safety Maverick 88 action).