Strike Industries, Mass Driver Comp, 9MM, For Glock 17 Gen 3, Includes Recoil Spring/Guide Rod/Guide Rod Fitment Washer/Guide Rode Head, Black NEW WARNING Warning WARNING WARNING: This product contains chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information: www.P65Warnings.ca.gov No threaded barrel needed (but can be used) Eliminates the need for threaded barrels. 50 State Legal Widened bore to reduce baffle strikes and keyholing rounds 2.5mm relief cut at the top rear of comp to reduce "lipping" and damage to the face of the slide No permanent modification of weapon required Product Description The Strike Industries Mass Driver Compensator (MDC) represents a quantum leap in compensator design. Current designs have largely been unchanged since the 1930s. It's about time for something revolutionary. The Mass Driver name is inspired by the idea of theoretical mass driver engines in space travel. By ejecting mass, an equal and opposite reaction is generated propelling the space vehicle forward.