Product description Lightweight yet durable muzzle device machined from high-quality aircraft-grade aluminum and finished with a silver anodized coating. Threaded 9/16″ × 24 TPI to fit any accessory or barrel with that standard — this .40-caliber device reduces muzzle rise while keeping weight to a minimum. Ships with a free washer for correct timing and secure installation. Why choose this one Aircraft-grade aluminum construction — strong, corrosion resistant, and lightweight Silver anodized finish for long-lasting wear resistance and attractive look Standard 9/16″x24 thread — fits all 9/16″x24 threaded barrels/accessories Includes free washer for proper installation timing Compact footprint — effective performance without adding bulk