Haley Strategic Partners D3CR-H, Chest Rig, Supports .308 Platforms, Nylon Construction, Multicam, Includes (4) Rifle Magazine Pouches, (2) Pistol Pouches, (1) Large Pouch, (1) Small Pouch D3CRH-1-1-MC The Disruptive Environments Heavy Chest Rig (D3CRH) was designed as a no-frills load carriage solution and addresses the same mission as the X Chest Rig but with optimized magazine pouches for support of 7.62x51 weapons platforms (.308 platforms). The Heavy is favored by the U.S. Marine Corps as it was built for the most hostile engagements in the most disruptive environments.