Paintball

[toymachine]

Could you get us some better pics? Really hard to tell what I'm looking at. Iono though, looks like it might be okay, but I can't really see too well so don't necessarily go by this advice.

Exciting project! nice going

[surein]

The pics are from the seller. What's shown is the rear without the back block. My concern is how close the top tube is cut close to the bolt cavity.

Interesting indeed cause I want this to be light as possible

[toymachine]

I see what you mean now. I think you'll be fine, if what you're worried about is enough meat to instal a horizontal CCI/Phantom-like stock class feed block/tube. Especially if you use the helicoils (and given what you're working with that I now see you definitely should). The rear section of the top of the body, where the rear half of the bolt is located, looks ridiculously thin, but this shouldn't be a problem or affect anything related to installing, drilling and tapping holes for your helicoils/stock class feed block/tube. You'll be fine. Good luck!