Edited for clarity:
I thought I would take a minute to apologize to the internet.
I recently purchased a G3 kit included in which was a GW receiver. I got a little butt-hurt after being told by two different builders that Gewehr Werks receivers are too much trouble to bother with. I started to besmirch the seller (gasp).
This evening I cleared my head of bad thoughts and sort of "assembled" the receiver. I slid on a grip frame then pushed a buttstock in place. I grabbed the recently assembled bolt and dropped it in. It slides very nicely up and down the recoil spring. It also slides thru the receiver very nicely. I'm going to hang on to this. I'll add it to my stash. I'm still going to use the PTR for my K build (if it ever comes together) but this GW will be good for something, someday.
Sorry seller. I admit that it's not welded up yet, heat may change things, but I dont think it's as bad as I made it out to be. You deserve an apology.