When the slide is locked back and I slam in a full mag, the slide is released – how can I fix that?
There is nothing to fix. When you slam a loaded mag into the gun, the gun is usually at a slight angle with the muzzle up. When you slam in the mag, you cause a slight rearward momentum on the slide and release pressure on the slide stop lever, thus allowing the slide stop lever spring to do its job and return the slide stop lever to the lowered position.
