Warne Magazine Extension Features The Warne Magazine Extension is machined from 6061-T6 aluminum a lightweight yet strong alloy that holds up to repeated insertion and removal cycles without deforming. Its hardcoat anodized gray finish adds a layer of surface hardness that resists wear and corrosion compared to a bare aluminum part. Designed specifically for Glock 17 and Glock 22 magazines the extension adds 4 rounds of capacity in .40 S&W giving shooters more rounds on tap before a reload. That added capacity can matter in a duty competition or home defense context where every extra round reduces how often a magazine change is needed. An ergonomic shape on the extension body improves how the magazine seats and inserts into the magazine well reducing fumbling under time pressure. Finger grooves molded into the base allow a shooter to strip the magazine free of the handgun by hand if it becomes stuck or needs quick removal. This combination of ergonomics and finish makes the extension as functional in daily carry and range use as it is in competitive stages. Glock 17/22 shooters wanting more capacity without switching to an aftermarket magazine will find the Warne extension a simple durable solution for sale at GrabAGun. Warne Magazine Extension Specifications Manufacturer: Warne Model: Magazine Extension Compatible Hosts: Glock 17 / 22 Magazines Caliber: .40 SW Capacity Increase: +4 Rounds Color: Gray Finish: Hardcoat Anodized Material: Aluminum Available At: GrabAGun