US made barrel nut which may or may not be considered a 922r part, but in case it is ever questioned then you are covered.

The size of this part was taken from a Romanian underfolder parts kit and looks very close to a Russian nut off of a milled front end.  Threads are 14-1 left hand.

Standard AK-47 barrel pins made from tool steel and heat treated like the originals. The dimensions of these were taken from Romanian barrel pins.

(description below taken from the manufacturer's website)

Strong and simple ambidextrous magazine release that really works! A natural evolution of the AK-47 magazine release. Similar mods have been seen from the sands of Iraq to Eastern Europe. Dramatically decreases magazine change times. Effective for competitive shooting or any circumstance that requires reduced magazine change time. Mag release comes with black phosphate finish, is pre-drilled, and is ready to attach to your existing magazine release. Unit comes complete with instructions that will have you dropping mags faster in no time!