I just finished mine that I got from Discount Guns Kirkland 3 years ago. Way below requirements. A real pain moding the frame to move trigger assy. I used Tromox stuff. There is other parts out there that are drop in. I had to make a custom part to tie in the colapsable stock, no big deal. I don't know how the new gas plug will react but it's cool looking. The Poly-Choke is a real pain to clean. Wifes bugging me to go to dinner, sorry for any mispelling.