JP Adjustable Low Pro Gas block | D2 Series

$149.95 - $159.95
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The D2 Series gas block lineup. These ultra-minimized designs will fit under most 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 and 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.

Patent Pending


  • Slim Profile Design: The D2 Series boasts a streamlined profile, purpose-built to fit cleanly beneath even the slimmest profile hand guards with top rail, such as our M-LOK Series.
  • Short Journal Optimized: Shorter dimensions cater to shorter gas block journals such as those on Proof Barrels, ensuring a superior fit.
  • Enhanced Dirt Tolerance: The exterior detent mechanism on the nut enhances dirt and carbon tolerance while the robust 5/32 drive also allows for heavier torque to overcome and easily eject fouling.
  • Minute Adjustment Refinement: With 52 clicks between full open and full close, the D2 Series doubles the adjustment clicks of our current detent blocks, making them ideal for SBRs and other high-pressure/short-dwell-time barrels.
  • Versatile Adjustment Options: The adjustment nut features a 5/32 hex drive and slots, providing flexibility for customization with a range of tools, including screwdrivers and knives.
  • Lightweight Design: The D2 Series add negligible weight at just 2.5 oz.


  • Barrel Diameter: .750 or .875
  • Material: 416 stainless
  • Finish: Black
  • Weight: 2.5 oz.
  • Attachment: 6-32 x 3/8" socket head screws
    (includes 5/64 x 5/16 roll pin for gas tube installation)
  • Adjustment: 5/32 hex or screw driver