The JP Enterprises JPGS-11D2 and the JPGS-12D2 are the .750/.875 entries into our D2 Series gas block lineup. These ultra-minimized designs will fit under almost any hand guard on the market while adding negligible weight to the barrel. The D2 Series features a redesigned forward-facing adjustment that avoids any access interference with hand guards. This new adjustment design is also excellent, shedding dirt and fouling while doubling the adjustment clicks per rotation to provide extremely fine gas control. The two-piece design allows for easier installations even on barrels with pin-and-weld muzzle treatments.