This is the factory FN P90 5.7x28mm 30-round magazine.

This 30-round magazine is designed to fit your FN PS90/P90 firearm. This factory magazine is constructed with a durable polymer body, featuring a translucent smoke finish.

A heat-treated chrome silicon spring and Dupont Zytel-based polymer follower ensure a reliable and smooth feeding experience for your 5.7x28mm rounds.