The MARCK-10, also known as the “Hydra”, is the base system for everything associated with the Hydra® Modular Weapon System.  This configuration of the Hydra-10 gives a HARD-HITTING setup to take down larger game as you desire. The Hydra-10 runs on a standard SR-25 Magazine and is DPMS patterned. The Hydra-10® comes with a quick-Change Barrel Upper Receiver (QCB-D). The Hydra-10 comes with a BLK B5 systems stock and pistol grip. With this system you can swap your AR-10 to any caliber that can shoot out of AR-10. To convert this system to another caliber, the most you will need to change is the barrel, bolt, to the desired caliber. With this system you can make the Hydra-10 fit whatever situation that you are in. Rifles will come in 16″, 18″.

ONLY THE BARREL IS QUICK CHANGE, NOT THE MAGWELL.