At HYDRA WEAPONRY, the possibilities are endless and with so many calibers at your fingertips to choose from! The HYDRA ® Conversion Packages will give you the option to pick and choose your favorite caliber for your Hydra.

MGI is the manufacture of the MARCK 15, also known as the "Hydra", is the base system for everything associated with our system. It includes the Modular Lower Receiver with a 5.56 (AR) Magazine-Well, the QCB-D Upper Receiver and a 16-inch barrel with an A2 sight tower and MGI's modified bolt carrier.

Jul 5, 2014 · The Hydra, from MGI, combines a multi caliber lower with an interchangeable mag well and uppers in various calibers. Right now, MGI is making 5.56, 9mm, 7.62×39, and 300 Blackout.

Our collection of AR-15s for sale feature high-quality parts and accessories designed for performance. Shop AR-15 rifles at Sportsman's Outdoor Superstore.

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The MARCK-15 California Compliant Hydra is the base system for everything associated with the MGI® Modular Weapon System. This configuration of the Hydra is setup as a 5.56 x 45.

Oct 23, 2012 · MGI's Hydra may look like vanilla at first glance, but there's a lot more to the lope under the hood than a fouled plug. This design offers quick and easy barrel swaps, no tools required.

Aug 17, 2012 · MGI's Marck 15 Hydra should appeal to different shooters on at least one of several levels. First, it is truly modular and adaptable to a wide variety of cartridge chamberings.

Online shopping from a great selection of discounted Semi-Auto Rifles by MGI at Sportsman's Outdoor Superstore.

Online shopping from a great selection of discounted guns for sale by MGI for sale at Sportsman's Outdoor Superstore.