Henning Group Blueline Magazine Extension and Spring for Glock 17/34 - 9mm
Magazine extension for Glock 17/34 increases capacity to 21 + 1. Comes with extra power magazine spring.
Glock 17, 17L, 34 - 9mm Standard Length Mags
Designed in collaboration with a current SWAT Operator and US Army Veteran, our Magazine Extensions offer:
Confident magazine indexing through our patent pending design.
Improved grip support for shooters with larger hands.
Basepad allows for an effortless strip with the knife-edge of the support hand on malfunctions or stuck magazines.
Designed by a door-kicker, for door-kickers.
The kit comes with magazine extension and a longer magazine spring.
The distinction between inferior quality and premium Glock Mag Extension is undeniable. At MSP, we only offer Accessories for your Glock from the most trusted brands like Henning Group. Buy with confidence that we stand behind the product we sell.
Customer Ratings & Reviews
Best Glock 17 magazine extension
Use this product on a Glock 17 magazine to give me 21 rounds with my off duty carry. Great construction. Stays on solid. It comes with extra power spring. Easy to install. I liked it so much. I ordered a second one.