These M4 Style Telescopic G2 Contender buttstocks are made by Choate Machine & Tool. They are an answer to an ongoing problem in the G2 Contender world. A shorter length of pull (LOP) for smaller shooters, younger shooters and lady shooters, that want to use the G2 Contender rifle platform. The LOP is approximately 13" adjustable up to about 16". They are very comfortable to shoot and come with the frame bolt. AND for the guys that like the tactical look they accomplish that as well.