The Taran Tactical Innovation GLOCK +3/4 base pad is specifically designed for GLOCK models 17, 17L, 19X, 22, 24, 34, 35, and 45 in 9mm. This extension adds 4 extra rounds in 9mm and 3 extra rounds in .40 caliber to the magazine. The added weight assists in dropping the empty magazine free for quicker reloads.Key FeaturesIncreased Capacity: Adds 4 rounds for 9mm and 3 rounds for .40 caliber to compatible GLOCK magazines.Patented Push Pin Design: Allows for easy attachment and detachment of the base pad without extra parts or tools.Durable Construction: Machined from billet aluminum and hard anodized for long-lasting color and durability.Made in the USA: All machining and manufacturing processes are conducted in the United States.