Was it me?
Recoil spring and guide rod.
Extractor, plunger, & spring.
Firing pin and retainer pin.
Front & rear sights and an extra stock if you plan on falling down a lot, or slamming it in car doors.
Actually was it me?
I wouldn't buy any extra parts, and never have.
Mine is nearly 50 years old and hasn't broke anything yet!
rc