精选优质文档-倾情为你奉上Protection LevelsDefinition of Protection: Based on ballistic material providing a 90% probability of protection from the threat (established by STANAG 4164).Threat Level 1 (Rifle)Artillery Simulator: 20mm FSP (simulating 155mm threat) at 520 m/sec from a distance of 100 meters. Due to very low probability of a large fragment retaining enough velocity at these distances, STANAG 4569 makes this optional.Ammunition: 5.56mm x 45 M193 BallDistance: 30 metersProjectile We