Liberty is proud to announce the Eclipse Flash Hider. Important Disclaimer: Use of This Muzzle Device May Void the Warranty Policy of Some Silencer Manufacturers. Liberty Precision Machine LLC Will Not Be Held Liable for Damage to These Products. Always Confirm Alignment Before Use.Features :All critical alignment features machined in one set up,Compatible with common .900"-24 silencer mounts like the Q Plan-B and Rearden MFG Atlas".30 caliber bore"13/16" rear hex for easy installation and removal,CNC machined from 17-4 PH stainless steel