DSG Defence  Security Group Multi Environment Ammunition MEA Dual Core Supercavitating Ammunition Underwater Rifle Ammo Richard Morgan NDIA Small Arms 2011 DefenseReview.com DR 29 <!  :en  >DR Exclusive! Revolutionary DSG Technology Supercavitating Rifle Ammo for Shooting Underwater (Tactical Underwater Shooting), from Air to Water, and from Water to Air: Amphibious Multi Environment Ammunition (MEA) for Tactical Waterborne Operations (Photos and Video!) <!  :  >