Adapt Your 9mm Smart Laser Cartridge To Work In Your Favorite 357 SIG Handgun! If you would like to use your favorite 357 SIG handgun as well, there&';s no need to buy another laser! The 357 SIG adapter ring is the way to go. Use this adapter ring to convert your 9mm Smart SureStrike into a 357 SIG laser training cartridge. Easy to install, and no tools required! Simply thread the 357 SIG caliber adapter ring onto the Smart SureStrike 9mm laser cartridge. Install the safety pipe and nut, and you are good to go! Check out our components for the safety pipe & nut to use with this adapter ring.Important: All semi auto pistol adapter rings require the use of a safety pipe and nut.