Title says it all. Im looking for a company that either sells, or would be willing to make me a glock 21.4 slide that is heavier than OEM. I plan to be shooting .45 super or .460 Rowland out of my gun, and ive heard that in addition to a good recoil spring, having a heavier slide can help improve the longevity of your gun, and make magazines function better. (the slower cycling will keep the mag from being outpaced) Official .46 rowland dot com sells a weighted rear sight to make the slide heavier, but i think id rather have sights of my choosing, so im trying to find a slide that is, itself heavier. Ive heard Lone wolf slides may be heavier than average, but I dont see any G21.4 options there. Does anyone have any other leads for me? Anyone who advertises heavier slides? Does anyone know what metals or construction process might result in a heavier slide? Any info welcome.