This is a Beretta® Px4/Cx4 9mm 15-round magazine.
Constructed from carbon steel with a glossy blue finish, these magazines feature a standard 15-round capacity and a polymer base plate. Beretta’s NATO-approved Px4 Storm is a reliable, accurate DA/SA pistol that’s trusted by military and law enforcement agencies from all over the globe. These 9mm factory replacement magazines are manufactured to Beretta specifications and tolerances for consistent feeding. This magazine is compatible with Px4 Storm pistols (fits flush in full size, extends from the base of smaller pistols) and Cx4 carbines equipped with Px4 magazine well insert/release.