This configuration of the Hydra is set up as a 45ACP that utilizes Glock Style 45ACP magazines.  It includes the Hydra® Modular Lower Receiver with a 45ACP H21 Magazine Well, 45ACP Glock Style Magazine, the Hydra® Quick Change Barrel Upper Receiver (QCB-D), the Hydra® 16-inch 45ACP Blowback Barrel, a 45ACP Blowback Bolt, and a B5 systems stock and pistol grip. With this base rifle, you can purchase and utilize the rest of an ever-growing system including our various magazine wells and caliber conversions. To convert this system to another caliber, the most you will need to change is the barrel, bolt and bolt carrier, and magazine well to the desired caliber.  With caliber conversion kits readily available, this weapon system continues to grow and become the most versatile Black Rifle platform the industry has ever seen.

DO NOT DRY FIRE YOUR LOWER WITHOUT A MAGWELL THIS CAN RESULT DAMAGE!!!