Is your gun loaded by a magazine or by cartridge? If your gun uses magazines set the reload animation to bottom clip. If your gun uses cartridges then add one cartridge, set it to "Ammo" and then put it into the gun.
I selected the rifle reload animation for my model. with other setting I tried to put in 0,25 in everthing. and i put in 2, 1, 2 ,1 in the reload animation section( talking about model\type specific settings. What happens when i load my gun into minecraft is when i reload, the gun just moves to the side and back. Can anybody help me please?
The position of the legs is set wrong. Your position is probably in the knee, or somewhere high. I'd suggest you set the position to the location of hip and hope for the best. I've never created a mech myself.
EDIT: Yes, now I checked the linked screenshots. Your leg position is at 0,0,0 which makes them move around that position. The yellow ball, that indicates the position, should be located at the point where you want to make the leg move. For example, to make that correct, the yellow ball should be located at the top of the leg.