GLO-70M

Glock OEM maritime spring cups.  These are the original Glock spring cups that allow water to drain from the firing pin channel so as to not create a hydrolic effect and not allow the firing pin to clear the breechface of the slide.  NOT INTENDED FOR USE UNDERWATER!  The intended use of these is in case the pistol is submerged in water, it is able to immediatley fire upon exiting from the water.