Parts of War, Inc. Also available directly from our online store (partsofwar.com) FREE SHIPPING!! BAD-LGB-Ti-625 Lightweight, Low Profile Titanium Gas Block Specs: Low Profile Gas Block for .625" Diameter Gas Block Journal Ultralightweight 0.03 lbs (0.48oz) with SS Screws Precision CNC from Grade 5 Titanium (2) Stainless Steel Set Screws Included Distinctive "C-Shaped" Profile for Function and Elegance