The NDZ AL1 Aluminum Grip Frame Insert Plug for Glock Gen 1-3 models helps keep debris out of the plug cavity and entering the trigger mechanism housing as well as the firing assembly. In some cases you can even store items in the frame cavity and seal it off with our plug to keep them safe, dry and concealed, such as extra springs or small medical items. The aluminum is durable and lightweight yet still adds enough weight in the right places to help mitigate some of the muzzle flip and felt recoil. By adding weight near the bottom of the magazine frame it counters the top-heavy momentum when shooting, allowing you to handle the gun with more control and increased performance in every situation. Available in multiple finishes offered with and without laser engraved designs for that added personal touch. Manufactured to Exact Tolerances from 6061 T6 Aircraft Billet Aluminum & Anodized for Extreme Durability; these parts will not chip or break. Upgrade the grip plug on your Glock to a solid aluminum part from NDZ Performance and see how much it will improve your shooting experience today!