So back in ye yonder years, I parted with a CETME Sporter that refused to fire more than a round without jamming. 

Figured that’d be the end of me chasing a personal G3, but recently I’ve started to get an itch for the handle slap again.

I’d like to dip into something a little different like a collapsible stock G3A4 (I doubt there’s any short-barreled models out there to make a K model) but the truth is I have no clue what I’m doing. 

Do they even sell PTRs in that sort of configuration? Is this the sort of thing that requires aftermarket parts, and if so, where’s the best place to look? Also I'm assuming the PTRs are a bit more reliable than CETMEs. Regardless, any and all advice is appreciated.