I've been buying and using Glocks since the 1990's. Over the years not only did I buy their guns, but I bought into their system. A lot of interchangeable stuff like barrels, threaded barrels, magazines and other parts easily bought on the market. With Glock Gen5 you have no interchangeable parts with other generations to include barrels with no threaded, no prior generation magazines or other parts. So…no Gen5 for me! The new Glock 19X will take the old magazines, but not the Gen5, but has the new barrel. Consider this when buying it.