This drop-in trigger system is designed exclusively for shark Coast tactical. The flat face trigger shoe is machined from 7071 billet aluminum. It minimizes pre-travel, has adjustable over travel, and reduces pull weight, giving you an incredibly crisp break and efficient action. The hi polished trigger bar is Glock OEM that is enhanced for this proprietary design. The system includes a reduced firing pin spring and firing pin safety spring. This system achieves maximum performance while keeping your Glock reliable predictable, and 100% safe!