I think internal parts are a good choice. You never seem to be able to find them when you need them. A good FTK for under $250 is a good start, but common items like gear sets, head sets, motors and barrels, etc. Selectors and tappets are good to have around as well. I would think that between Systema, Gaurder, and maybe Hurricane on the lower end might be nice to see.
Age verifier Northern Alberta
Democracy is two wolves and a sheep discussing what's for dinner.
Freedom is the wolves limping away while the sheep reloads.
Never confuse freedom with democracy.