Forward Controls Design Flash Hider .30 Carbine 5/8x24 Nitride Black. 30cal sound suppressors with Keymo interface. Threaded for 5/8x24 precision machined from solid 4140 steel bar stock heat treated and QPQ treated it is probably the finest A2 style comp/flash suppressor ever produced. Its 3 and 9 o'clock ports are 25percent smaller (shorter and narrower) than the other three upward facing ports so more gas is vented through the upward facing ports it is a superior compensator to the A2 its flash suppression is superior to that of a longer factory A2 style flash suppressor. 6310KM is a light and short blended performance muzzle device. It provides 15percent to 20percent better muzzle rise compensation than the A2 and what is impressive is that it does so without sacrificing its flash suppression capabilities or creating more noise and concussion. Forward Controls Design is an authorized licensee of Dead Air suppressor mounts. Proudly designed and made in specialized factories. Do not use a crush washer if this is going to be a suppressor host. Specifications for Forward Controls Design 6310KM Flash Hider: Manufacturer: Forward Controls Design Color: Black Caliber: .30 Carbine Finish: Nitride Fabric/Material: 4140 Steel Threads per Inch: 5/8x24 Length: 2.38 in Weight: 3.8 oz Package Contents: Forward Controls Design 6310KM Flash Hider Single use packet of Rocksett Forward Controls Design 6310KM: 6310KM Flash Hider .30 Carbine 5/8x24 Nitride Black