The H&K Heckler & Koch Mag P7 M10 P7M10 10 Rounds. 40 S&W Gray Pistol Magazine is a high-quality steel magazine designed specifically for handguns. Phosphate gray finish with black steel base and metal follower! Made by the renowned brand Heckler & Koch in Austria, this magazine holds up to 10 rounds of. It is durable and reliable, making it an essential accessory for any handgun user looking to practice or hunt with their firearm.