Finally took some time today and mounted the upper on my old Seekins lower. Put some spare stuff on. Need to get a momentary switch cover.
bump
Yes, not a pistol or rifle at that point, till an upper and stock(designed to be fired from the shoulder) is added. Just make 100% sure it's transferred correctly as a receiver/other on the forms, toss the crappy stock and replace it with a brace.
Awesome lower BTW, have built probably a dozen M4E1s with 0 problems ever. Uppers are hard to find, but you can use mil-spec(matches the shape), M4E1(matches the design) or Aero thunder ranch(M4E1 without FA).
Yup, just as a receiver on the paperwork. That's what I figured. Yeah every part of the lower seems well thought out...especially for the price.