JP Enterprises Adjustable Gas System .936The JPGS 8 model is our . 936 minimized large bore design intended to mount underneath many hand guard models on the market. This model also now includes our locking adjustment feature, which consists of an integral brass set screw that can be tensioned against the adjustment screw after it has been set to prevent any migration that might occur. Full coverage around gas port providing improved seal and better heat dissipation True clamp on design with