Founded in 2017 in Bigfork, Montana, Shield Arms was established by Brandon Zeider and Seth Berglee with a mission to bring innovation and fresh thinking to the firearms industry.

One of the brand’s standout innovations is the S15 magazine—an upgrade for Glock 43X and 48 pistols that increases capacity to 15 rounds while maintaining the size of a standard 10-round magazine. Its smart design delivers higher capacity without sacrificing reliability or safety.

But that’s just the beginning. Shield Arms also offers the Z9 magazine, boosting the Glock 43’s capacity from 6 to 9 rounds. Their extensive lineup includes magazine extensions, magwells, triggers, magazine releases, and other performance accessories for Glock pistols and AR-15 rifles.

In the U.S., Shield Arms provides a specialized service known as the Grip Chop, which modifies Glock 43X and 48 frames to accommodate 10-round S10 magazines—maintaining compatibility with concealed carry needs.

Recently, the company introduced a breakthrough known as the Revolver Optic Conversion (ROC). This innovation allows shooters to mount a red dot sight onto Smith & Wesson Model 442 revolvers without any milling or permanent alterations, enabling optics on platforms never originally designed for them.

What began in 2017 as a small garage workshop has grown into an internationally respected manufacturer with a team of forty employees and ongoing expansion plans. All Shield Arms products are proudly designed and manufactured in the United States, bearing the Made in USA label as a testament to their quality.

Thanks to its focus on quality, innovation, and functionality, Shield Arms has earned the trust of firearm enthusiasts around the world.