Fits All Glock Models Maritime/Marine Spring Cups enable your Glock to shoot underwater and under hostile environmental conditions. They ensure that even with water and or debris inside your Glocks firing pin channel your Glock pistol will fire! Great for those who prefer a Glock for predators on shore as well as in the water. Glock will only sell this item to law enforcement agencies and the military with an official purchase letter on agency letterhead. We have them in stock for a limited time. This is the one item that is specified by teams that are on the tip of the spear! These are called the million dollar parts. Because if you loose one your pistol is worthless. So it's worth a million bucks to have a spare set. These parts work on all Glocks-1 size fits all!