Arisaka Defense Series Weaponlight Body Compatible with SureFire M600DF/Dual Fuel Parts Converts to use Batteries Anodized Finish Black. This light body converts the light to use an 18350 cell instead of an 18650 cell" reducing the length by over an inch. The 18350 Series Light Body is manufactured without the mounting interface for the stock Picatinny clamp. This greatly increases the clearance for front sights when used in combination with the Arisaka Inline Scout Mount on handguards with 45 degree mounting surfaces adjacent to the top Picatinny rail. It will also fit in any aftermarket Scout mount" as it retains the mounting holes and square lug interface on the underside of the light body. Specifications for Arisaka Defense 18350 Series Weapon Light Bodies: Manufacturer: Arisaka Defense Color: Black Finish: Anodized Black Additional Features: Weaponlight Scoutlight Battery Type: 18350 Package Contents: Arisaka Defense 18350 Series Weapon Light Bodies