RADIAN WEAPONS R0376 Raptor-SD Charging Handle AR-15, M16 Radian OD Aluminum The silencer-optimized Raptor-SD features a ported shaft designed to redirect gasses down and forward, away from the shooters face when shooting suppressed. Its ambidextrous design allows rapid palm "blading" or finger-thumb charging of the weapon, ensuring the motion is fluid and fast from either strong or support side.