Here's some pictures to describe the problem with my TM Hi-Capa 4.3.
This is the PGC Slide off the stock TM frame.
This is what happens when I rack the slide normally, irregardless of how hard or soft I let it return to battery.
This is the Creation chamber eating into my PGC slide. It sits lower than it should, wedging in between the slide and the BBU.
This is how the Creation chamber rest when the slide jams. Note the overtravel when it slams into the rear of the chamber breach.
This is the damage to the slide from the steel chamber.
More damage. Sigh...
Side view of the slide not returning to battery and chamber jamming, sitting lower than it should in the chamber breach ie. not returning fully and upwards into the slide lugs.
However, if I pull the outer barrel away from the muzzle when slowly returning the slide to battery, it works. Note the difference in chamber height in comparison to the picture above when it f***s up.
As advised, I chambered the slide lugs slightly on the muzzle side, mimicking the stock TM slide.
Smoothed the corners as well.
The small notch that was worn down on the base of my hop-up unit. I restored it with some nylon plastic and superglue and sanded it smooth and flat, thinking that this would help to push the chamber upwards at the end of the slide return and into the correct position in the slide lugs. Not really working. But at least eliminated one suspicion.
The outer chambers side by side. Top is stock TM plastic, middle is Creation, and bottom is SD.
Smoothed out the sharp corners of the lugs of both Creation and SD chambers. Nothing else sanded.
Comparison of the chamber leg that holds the hop-up unit in place. Note the flatter design of the SD chamber compared to the stock and Creation chamber. The SD chamber wobbles when installed with the PGC slide ie. has up-and-down play, as well as forwards and backwards play. Could this be due to the flatter SD chamber legs, or did I just file too much material away? Creation chamber doesn't wobble, neither does the stock.
Comparison of the chamber lugs width on the Creation(left) and SD(right) chamber.
TM stock with Creation.
TM stock with SD.
Stock TM spring guide barrel with the PGC spring guide barrel that came with the slide. Note the edge that helps support the outer barrel on the stock TM, I thought that was the problem, so I put the stock guide barrel on to test it. Didn't work before I filed the slide lugs, haven't tried it again after. Not sure if that effects anything as I've seen may hi-capa outer barrels the support.
Creation outer barrel. Muzzle hole was a little tight so sanded it evenly. Trying to mimick everything on the stock TM outer barrel as much as possible.
SD chamber with the Creation outer barrel on the PGC slide. Has more up and down as well as back and forwards play on the PGC slide. Might have shaved too much off? Didn't take much off the SD chamber lugs (not that easy to overdo it with steel).
More overtravel of the SD outer chamber in the chamber breach than the Creation outer chamber.
I love how it looks. But it doesn't work. OMG.
Hope that is more informative and can assist you gun gurus in deducing what the hell the problem is. Please HELP!