Radian Weapons Raptor SD Ambidextrous Charging Handle, Ported, Black, 5.56MM R0006 The silencer-optimized Raptor-SD features a ported shaft designed to redirect gasses down and forward" away from the shooter's 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. The Raptor-SD is compatible with most AR15/M16-pattern rifles.