The Aimpoint™ A-Minimize™ enables the pink dot sight being mounted immediately over the pistol without the need for adapter plates. This optimized process produces a safe and steady connection concerning the Aimpoint COA along with the GLOCK pistol. Glock pistols with these upgrades are informally known as (early) "3rd-technology" versions. https://yoursocialpeople.com/story4262821/glock-an-overview