Designed with Milsig Heatcore™ system, full aluminum receiver with unrivaled quality, with adjustable stock and 25cm picatinny rail, easily personalized your own tactical style.M5L1SpecificationsLength: 845mmWeight: 2820gCaliber: .68Ammo: .68 PaintballPower Source: HPAManuals[EN] MILSIG Modular Blaster System (MMBS) Introduction [EN] HPA Blaster 101 [EN] M5 Series User Manual