Anarchy Outdoors HK Extended Mag Release Gold. The Anarchy Outdoors HK Extended Mag Release makes the transition between magazines smoother so you can continue shooting without fumbling while changing the magazine out. This product is not manufactured authorized endorsed or warranted by Heckler & Koch. Specifications for Anarchy Outdoors HK Extended Mag Release: Manufacturer: Anarchy Outdoors Gun Make: Heckler & Koch Gun Model: Heckler & Koch VP40 Heckler & Koch VP9 Features of Anarchy Outdoors HK Extended Mag Release Works for the VP9 and VP40 HK handguns; Not Compatible with the HK-45 Package Contents: Anarchy Outdoors HK Extended Mag Release What firearm models does the manufacturer say Anarchy Outdoors HK Extended Mag Release is compatible with? The manufacturer says that Anarchy Outdoors HK Extended Mag Release is compatible with Heckler & Koch VP9 Heckler & Koch VP40Anarchy Outdoors 791617487383: HK Extended Mag Release Gold