Tough call, Benny.
The full stock is the coolest, imo, but the retractable stock gives you some versatility.
As for folding stocks, full stocks, etc... I've read and seen similar reviews. Each company seems to do them differently and some are not that great. Some stocks lock in place well and others not so much.
We're both newbs though so me giving you advice kinda like the blind leading the blind. lol.
Here we are again bro -just you and me. Same kind of moon same kind of jungle. Real number 10 remember? Whole platoon, 32 men chopped into meat... We walk out just you and me, nobody else. Right on top huh? Not a scratch... Not a fuckin' scratch... - Sgt.Mac, Predator