The Agency Arms +5 Magazine Extension for Glock 17 enhances your 17-round magazine capacity by 5 rounds for 9mm, allowing for greater firepower during critical moments. Constructed from durable 6061 aluminum and finished in an anodized OD Green, this extension features Sage Dynamics engraving and a dot matrix panel for easy marking. The chrome silicon alloy spring ensures reliable performance, while the extended ledge allows for one-handed manipulations, making it an essential upgrade for serious shooters. Made in the USA, this magazine extension is designed solely for Glock 17 17rd magazines and is not compatible with reduced capacity magazines.