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. The Raptor-SD is compatible with most AR15/M16-pattern rifles. Features : Aircraft Grade 7075 Aluminum Ambidextrous Mil-Spec Anodized Made in the USA