This is a drop-in Glock conversion barrel for the model 23 to 9mm, made by Storm Lake. Switching this barrel with your existing Glock 23 barrel (chambered in 40s&w) will change the caliber of your firearm to 9mm. When this is done please use the correct magazines, which will be made for the model 19 and stamped 9mm. Also, please use the correct ammunition, 9mm.
This modification should only be completed by a competent Gun Smith.
