For recoil I can tell you from experience, not much. A lot of the time we would not use the shoulder stop, but would be pushing down really hard on the top and pull down on the front grip,and pin it onto the gunners turret shield and even then it wouldn’t kick back like it did on this guy. This dude was basically limp wristing it with both hands and not using the shoulder stop, then bitching about the gun being the issue.