CHEYENNE, Wyo. — The U.S. Marine Corps has selected Magpul Industries as the exclusive maker of ammunition magazines that Marines will use in combat.

Magpul is a private company that makes accessories for firearms, including magazines, grips, sights and slings. The company also recently started selling soft goods like hats, belts, shirts and gloves.

The operations, shipping and manufacturing portion of Magpul is based in Cheyenne, while its headquarters is located in Austin, Texas.

A press release from Magpul says the Marine Corps selected Magpul’s GEN M3 PMAG series of magazines after several years of testing.

The Wyoming Tribune Eagle reports that the company had added a second shift to handle demand for its products. Magpul started with 102 employees in Cheyenne but now employs 380.

Magpul, which used to be based in Erie, pulled out of Colorado last year in protest of a gun-control bill that Gov. John Hickenlooper signed into law in 2013 prohibiting the sale of gun magazines that hold more than 15 rounds in the aftermath of the Aurora theater shooting.