[mateba]

You could try drill and taping some set screws around the cylinder or call in a friend that can tig weld. Have you looked around for another stock cylinder? Some of the guys here have had luck annoying the piss out of Leapers for UTG stuff.

 

[mateba]

Yeah, you are going to have to run by a local welding school or machine shop and have it done. The school will be cheaper. Just talk the the professor, ask if a student could tig it for you, and pitch him $20 and tell them both thank you. I agree with the above comments, limping your current cylinder along is only going to result in you needing to buy a nicer one eventually.