Adapt Your 9mm Smart Laser Cartridge To Work In Your Favorite 5" Barrel Handgun! Extend Your Safety Pipe An Inch For Longer Barrels! Sometimes 1 inch longer is all what you need. The safety pipe extension will extend the pipe that you have an extra one inch! Together with the most popular short pipe we offer (included in all Safety Pipe Kits and Caliber Adapter Kits) the extra inch will allow the shooter to use the laser with barrels of up to 5inch. In case of handguns with barrels longer then 5 inch, you can use the Short safety pipe with the included extension or add one more to the pipe you have. The safety pipe extension is built from plastic, using a different material then the aluminum pipe allows installing the extension on the pipe in a way it will not open when racking the slide of the gun. Important: All semi auto pistol adapter rings require the use of a safety pipe and nut. SKU: 9MSP-E Safety Pipe Instructions PDF