Parts of War, Inc.
Also available directly from our online store (partsofwar.com)

The Battle Arms Development BAD-ATG™ (Adjustable Tactical Grip) easily adjusts, with the included hex key, to each of the three most popular industry proven angles (17, 25, & 33 degrees) using the Patent Pending adjustable angle mechanism. The textured finger grooves and ribbed back-strap optimize comfort and provides positive control. Dimpled air gaps help keep hand dry while offering firm grip texture.