Help out with Bore-up

[ultimentra]

Hey I found out the G&G UMP I have has a bore-up kit in it. However since this gun isn't designed for a bore-up kit (not hard enough spring nor large enough barrel) I need it out. I don't know what company makes it, nor do I know what gun it was supposed to be designed for, but someone put it in there somehow. (Our team mechanic confirmed that it was a bore-up kit of some kind). I was wondering if anyone was willing to trade internals for internals with me or if anyone knows of bore-up kits for UMPs and who makes them. Thanks for the help in advance!