Phase 5 Weapon Systems Mini Hand Stop, Compatible with M-LOK Rail Systems, Black Finish MHS-MLOK-BLK The Phase 5 Mini Hand Stop MLOK (MHS-MLOK) is an ultra-lightweight rail attachment that will assist the operator with indexing their support hand while deploying the weapon; as well as keeping the support hand in the same position while firing. The MHS-MLOK can be mounted on the bottom or either side of any M-LOK compatible rail system in a forward or reverse direction" allowing either a push or pull style grip.