Originally Posted by capitalpaintball
your pic doesnt work.
there are 3 screws in the frame 1 in the back and 2 in the front. the 1 in the front closest to the trigger should be tight with an allen. you shouldn't be removing that one.
the one at the front of the frame is a thumb screw normally. finger tight. same with the back.
There are usually two thumbscrews that hold the frame to the body, in the pic, they have black heads. The rear one holds the body (and ASA/tank adapter) to the frame and screws in from the top. The forward thumbscrew screws in from the bottom, through the frame. The other, brass screw (mine was replaced by the pro-shop years ago) holds the barrel in.
The forward thumbscrew is an 08-32, the rear is a 10-32.