The suppressor-optimized Raptor-SD(TM) 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. Designed & Manufactured in the USA Machined from 7075-T6 aluminum MILSPEC Type 3 Hard Coat Anodized Finish w/ Cerakote Color Options Examples of popular models which AR10/SR25 is compatible: Aero M5, STAG-10, Armalite AR10, Knights Armament SR25, Daniel Defense DD5 V3, V4, V5, DPMS Gen1, and many others using DPMS Gen1 or Armalite AR10 platform. AR10/SR25 - NOT COMPATIBLE with SIG716, Savage MSR10, Smith and Wesson M&P10 these models use proprietary charging handle designs.