hardknoxni69a
Member
They are referring to FS 40 and FS 9 in the post
Fortunately for us Full Size, Compact, and Shield are all available for this conversion. They are stock barrels not conversion barrels just ask for the barrel that is needed a 4.25 9mm barrel or a 3.1 9mm barrel for the shield call S&W you may order the part from them or Google will help as well