i made minor modifications to my original design. This one clears the bolt carrier but I don't have a 7.62 upper or 7.62x39 snap caps to test.

hardware required:
-usgi Ar15 fcg
-carbine buffer tube kit (no castle nut or back plate though)
-Romanian single stack ak mags (not sure if Chinese or Yugo single stack will work...)
-a Bear Creek side charging upper receiver (not sure if other brands will work)
-4x 6-32 2" long socket head screws for supporting the back end.
-1x 6-32 1" long socket head screw for supporting the pistol grip
-1x 8-32 square nut and 8-32 5/8" socket head screw for indexing the buffer tube.
-1x 8-32 1 1/4" long socket head screw for the mag release
-1x 1/4" by 1" long compression spring for the mag release
-2x 1/4" 1.5" long screw posts or hitch pins for mounting the upper to the lower.

i think you may need to take a dremal and remove the lump between the feed ramps of the ar15 style barrel for this to feed properly.

LBRY Tags: ar15; ak; 7.62x39mm; ar; 3d printed lower