ProMag Springfield Armory Kuna 9mm 40-Round Magazine

Description

If you own a Springfield Armory Kuna in 9mm, this ProMag 40-round extended magazine fills a gap that's been missing since the platform launched. It's the first genuine extended capacity option for the Kuna, and it shows in the thoughtful design.

The magazine is constructed from DuPont Zytel-based polymer that strikes a practical balance between durability and weight. Inside you'll find an injection-molded follower paired with a heat-treated chrome silicon wire spring. That combination of materials is built for the kind of reliability you expect from range sessions, training, or competitive shooting where you want fewer reloads.

ProMag Kuna Magazine Build Quality

ProMag doesn't cut corners on this one. The mag combines traditional stamping and welding of heat-treated high carbon steel with modern precision injection molding of mil-spec polymer compounds. That hybrid approach gives you a magazine that can handle heavy use without falling apart. Made right here in the USA, it comes backed by ProMag's lifetime warranty against manufacturing defects.

Why a 40-Round Capacity

The Kuna platform ships with factory 30-round magazines, which are plenty for most purposes. But if you're running extended training sessions, competition, or you just want maximum capacity in a single mag, the 40-round version gives you real practical value without excessive bulk. It remains lightweight enough that you won't hate carrying it, but the extra ten rounds mean fewer interruptions downrange.