The ACH/MICH Helmet is available to meet NIJ 0106.01 IIIA. Fragmentation Protection. Protection against fragments from V50 450m/sec – V50 700 m/sec according to STANAG 2920 (17gr FSP) and US MIL STD 662F. Meets and exceeds the US Military V50 multi fragmentation requirement for the ACH helmet. Sizes. Small, Medium, Large and Extra Large. Colors