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MARCK-15 Hydra® .450 Thumper Modular Rifle


The MARCK-15, also known as the "Hydra", is the base system for everything associated with the MGI® Modular Weapon System.  This configuration of the Hydra is setup as a .450 Thumper and gives a HARD HITTING setup to take down larger game as you desire.  It includes the MGI® Modular Lower Receiver with an AR Magazine Well, an AR Magazine, the MGI® Quick Change Barrel Upper Receiver (QCB-D), a 16-inch .450 Thumper Barrel with a Low Profile Gas Block, the MGI® Modified Bolt Carrier with a .450 Bolt and Firing Pin, the MGI® D-Fender D-Ring for increased reliability, and a Standard M4 Profile Six Position Mil Spec Stock.  Everything comes packaged in a Standard Hard-Sided Lockable Pistol Case. With this base rifle, you can purchase and utilize the rest of an ever-growing system including our various magazine wells and caliber conversion kits.  To convert this system to another caliber, the most you will need to change is the barrel, bolt, and magazine well to the desired caliber.  For some calibers, simply changing the barrel and bolt on this weapon will allow you to fire multiple calibers.  This includes .223 or 5.56, .22LR, .300 Blackout, , 6.5 Grendel, and the .50 Beowulf®.  This weapon system continues to grow and become the most versatile Black Rifle platform the industry has ever seen.

All Rifles are test fired prior to packaging.

FFL is necessary to make purchase. All Federal and State Rules apply.

California, Massachusetts and New Jersey Residents are REQUIRED to select State Compliant Options.

Bullet Button Option is required.

State Compliant Options is required.

Shipping Information:

We ship UPS Ground. All Shipping & Handling
charges are applied at checkout and will vary
based on weight and shipping destination.