Mode 3 SF is a non NFA Tac-Con trigger system paired with a USM4 Rifle platform that provides, select fire capabilities while allowing the shooter to maintain accuracy and control of the weapons system. In semi-automatic it functions as a high-quality single stage 4.5 lb pull trigger that delivers zero take-up, a crisp break and has no over travel. In 3rd mode it transfers the force from the bolt carrier through the trigger assembly to assist the trigger back onto the front sear. This gives the USM4 the fastest reset possible allowing the shooter to deliver accurate and sustained fire making split times dramatically decrease without a sacrifice in accuracy. This system combined with USM4’s quality products makes the Mode 3 SF Rifle the fastest and most controllable BATFE approved system on the market.