Laser Ammo Adapter Ring 357Sig. Simply thread the Caliber Adapter ring onto the SureStrike cartridge and you are good to go No tools needed. Important: All pistol adapters require the use of a safety pipe and nut. Specifications for Laser Ammo SureStrike Adapter Ring 9mm to 357Sig: Manufacturer: Laser Ammo Caliber: .357 SIG Features of Laser Ammo SureStrike Adapter Ring 9mm to 357Sig: converts your 9mm Premium kit to a 357Sig caliber Package Contents: Laser Ammo Adapter Ring for SureStrike 9mm Laser Trainer - adapts to 357Sig 357 Sig Adapter Ring Features/Specifications: convert your 9mm SureStrike Premium Kit to a 357sig caliber. Included Accessories: 357 Sig Adapter Ring