KAK INDUSTRY 1/2-28 FLUTED SLIMLINE FLASH CAN Slimline Fluted Micro version for tucking inside of handguards for a more compact setup with short rails* Overall Length- 3.250"* Diameter- 1.200* Threads- 1/2-28* Bore- 9MM or Smaller* Weight- 3.42oz* Black Military type anodizing* Milled 3/4" flats for easy installation* Fully Precision Machined in House at KAK Industry6061 Aluminum device, designed to direct muzzle blast, flash, and gases directly forward, away from the user, enhance firearm appearanceDevice is not designed to reduce muzzle rise or flash signature. Crush washer not included