This model of the Storm Lake® Conversion Barrel is able to adjust your Glock® 23 Pistol from a 40 S&W® to a 9MM caliber. Made in the USA, using first class grade material, this Storm Lake® conversion Barrel is designed with modern technology to enhance your firearms capabilities. This Storm Lake® Conversion Barrel gives you the comfort and durability you expect from Storm Lake® and it helps you to pursue your target easily too.