Designed with Milsig Heatcore™ system, full aluminum receiver with unrivaled quality, stockless design with external HPA Tank, achieving perfect balance of capacity and portability.M5SpecificationsLength: 520mmWeight: 2160gCaliber: .68Ammo: .68 PaintballPower Source: HPAManuals[EN] MILSIG Modular Blaster System (MMBS) Introduction [EN] HPA Blaster 101 [EN] M5 Series User Manual