USED KAK 1/2-28 Slimline Flash Can 3.25in AR15-UP-260. 56 Or Similar Weapons Black Military Type Hard Anodizing This Device Is Not Designed To Reduce Recoil Muzzle Rise Or Flash Signature This Device Is Designed To Direct Gasses And Noise Forward Away From The Shooter And Enhance The Weapons Appearance A Crush Washer Can Be Used Is Specific Timing Is Desired This Device Can Withstand Full Auto Hard Use No Back Pressure Is Created So Gas Cutting Is Not A Problem Many End Users Have Reported Thousands Of Rounds Downrange With No Change Or Erosion 1.200 Dia 3.250 Long 6061 Aluminum Black Hard Anodized Finish 3.42 Oz. 3/4 Wrench Flats This Muzzle Device Will Fit Inside Utg Pro Aero Cop And Other Rails That Will Not Clear The Original Larger Version Specifications for KAK 1/2-28 Slimline Flash Can: Manufacturer: KAK Industry Threads per Inch: 1/2x28 Weight: 3.42 oz Fabric/Material: 6061 Aluminum Package Contents: KAK 1/2-28 Slimline Flash Can KAK AR15-UP-260: 1/2-28 Slimline Flash Can 3.25in