Herrington Arms HA Glock 43X Mag Pistol Magazine Extension 2-Round Black 2. We prefer this material for magazine baseplates given the amount of wear and tear they see on the training range in competition shooting or on duty as a first responder. With the floor plate design that we implemented on mag extensions it makes installing them and changing the springs after extensive use easy for the end user. Specifications for Herrington Arms HA Glock 43X Mag 2-Round Pistol Magazine Extension: Manufacturer: Herrington Arms Magazine Capacity: 2 Round Caliber: 9mm Luger Gun Make: Glock Gun Model: Glock 43X Features of Herrington Arms HA Glock 43X Mag 2-Round Pistol Magazine Extension Works well with OEM Glock mags Works with HA magwells DOES NOT WORK WITH MICRO DAGGER FRAMES 7075 weapon-grade aluminum ensures extreme durability THIS MAGWELL MAY REQUIRE FITTING DUE THE INJECTION MOLDING PROCESS Blems are cosmetic ONLY. They will function as normal DOES NOT FIT SHIELD ARMS S15 MAGAZINES DOES NOT FIT PSA MICRO DAGGER MAGAZINES Screw and Allen key included in the package Package Contents: Herrington Arms HA Glock 43X Mag 2-Round Pistol Magazine Extension Allen key bottom plate set screw pin What firearm models does the manufacturer say Herrington Arms HA Glock 43X Mag 2-Round Pistol Magazine Extension is compatible with? The manufacturer says that Herrington Arms HA Glock 43X Mag 2-Round Pistol Magazine Extension is compatible with Glock 43XHerrington Arms HE-G43-2-BL-2RD: HA Glock 43X Mag Pistol Magazine Extension 2-Round Black