Well I was thinking>.
1. muzzle comp
2.muzzle adapter
3.choke tubes
4.action cover/with or without weaver rail
5.trigger
6.hammer
7.thumb hole stock
8. comp stock kit(use's thumbhole stock)
9.would sight's and sling mounts count as parts?A forearmlight?
10.trigger guard
11.lotsa pins and springs>ect ect