[jamuke]

get a tb inner barrel..I happily used my glock for CAPS with very good accuracy( I had a PDI)

I would advise against an enhanced trigger spring, I had 2 pistons snap at the back (like the blow back unit in the hi capa) and these are NOT easy to find. neither is a stock non enhanced trigger spring( though I ran across a site rcently that had them for $5, of course I forget the site)

I found for slide and barrel that the gaurder tolerances were a little loose in the slide fit on the frame rails and outer barrel/slide fit could have been tighter

My PGC was nice and they are not that expensive

I also had the upgraded mag catch and trigger bar etc on one glock, the other stock one did not seem to suffer any from being stock.

however with the new mag catch it takes a bit for the part to wear in, occasionally the mag would not just drop out..a little gun movement would do to drop it ..eventually this will stop happening