Manticore Arms Eclipse Flash Hider 24mm Black. 62 mm caliber cartridge the 24 mm Eclipse Flash Hider uses a slightly twisted triple prong design to reduce flash to near zero in even total darkness conditions. The device is threaded 24mm and will clear any projectile up to .311 caliber and 7.62 mm. Do not use with larger calibers. The 24 mm Eclipse Flash Hider is marked "MA" and "30" and has multiple detent notches to allow it to thread down as far as possible. Specifications for Manticore Arms Eclipse Flash Hider 24mm: Manufacturer: Manticore Arms Color: Black Fabric/Material: 8620 steel with Rockwell 50C heat treat Length: 2.25 in Weight: 3.6 oz Additional Features: Threaded 24mm Projectile Caliber: .308 Caliber Diameter: 24 mm Features of Manticore Arms Eclipse Flash Hider 24mm Material: 8620 steel with Rockwell 50C heat treat Finish: Black oxide Weight: 3.6 ounces Length: 2.25 inches Package Contents: Manticore Arms Eclipse Flash Hider 24mm Manticore Arms MA-6810: Eclipse Flash Hider Black 24mm