Foam Flinging engine V 0.1
In short terms slamfire generally means a less sturdy system but you can shoot faster by holding down the trigger and simply priming the blaster it fires allowing a higher rate if fire.
However this doesn't mean a high fps blaster isnt possible if it has slamfire, its just a little harder and at the moment all 180+ fps slamfire blasters are aftermarket or from the community like the Lynx and Talonclaw.