1 Matador Arms Mag-X P320
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The AR15 platform is one of the most versatile weapons in the world. Its modular nature means it can be converted into everything from a.22LR to a long-range tack driver. Until now, pistol caliber AR15s have required the purchase of a proprietary lower receiver. Matador Arms has eliminated this requirement with Mag-X. The Mag-X is an adaptor that allows pistol magazines to be used in any Mil-Spec AR15 lower receiver combined with a 9mm upper. The anodized aluminum adaptor locks into the magazine well with the standard AR15 catch. Pistol magazines are locked and released using the built-in paddle-style mag release. The Mag-X has a built-in ejector and is compatible with all Glock-cut 9mm bolts. The Mag-X is available for Sig P320 magazines.