>>418442634
Receiver 2 arguably goes further. You had to do things like depress the magazine follower to insert new rounds in. In addition to the infamous constant glock-legging mechanics and misfires.
Vail had an interesting if completely useless feature where you could actually manipulate the fire selector of guns with your hands. So you'd have to go and move the lever thing on the AK-types if you wanted semi-auto. It also had way better scope implementations.