Are you getting the problem of the gun and slide jamming up together? Like when the side jams up the easiest way to unjam it is to push the outer barrel inwards to unlock it?
Well normally thats a sign the slide is no good. You can try adding lots of lube in there to make sure it runs nice and smooth. But ultimately you would probably have to replace something E.
Is there lots of wear on the chamber of the barrel? If thats the case then it could be the locking lugs in the slide are causing problems and hang ups. Or it could be the barrel is not tilting back fast enough and getting jammed under the slide. I had this problem with a lot of WE guns. The slide would go back so fast, that the barrel would not have a chance to tilt back, as a result, the slide would get jammed open. The way I fixed it was to just make sure there was lots of lube on the barrel, and the part where the inner barrel assembly and the outer barrel rub together.
I would try giving the slide lots of lube for now, and if worse comes to worse, you can always but an expensive non tilting barrel. Or you can take out the dremal and grind down the faux locking lugs on the inside of the slide. Or send the gun to me to play with
Since I owe you a favor
On a related note: Does anyone know if a KJW meu hammer will work in a TM Hi capa?