Problem fixed, I got such a big headache taking it out and putting it back together, I should've shaved some metal off in the mag well, but I took a flat head crew drive, and pulled the hop up in line with the mag. Problem fixed. Hope it doesn't fail again.

I put a little rubber O ring on the inner barrel just in front of the hopup to help hold the hopup in place.

For mine, the hop up came with this brass ring.

The O ring helps keep that brass ring in place as well. The O ring dose not fit inside the hopup like the brass ring. Just sits in front of it like in the pic. And a little bit of tape over the barrel C clip and you get a really good air seal.

Hey, I didn't know that, thanks for that tip!

Just a mod I came up with one day. I don't know if anyone els has done this before or not.? Im happy to help. Cheers

Do you know anyone with G&G medcap mags? They are about 1" longer than regular M4 mags.

They're 1" longer on the bottom, not the top.