The NEW GEMTECH flash hiders are the culmination of user feedback extensive testing and decades of experience. The new flash hiders are more aggressive than ever to cut down on carbon build-up in your suppressor and to prevent it from getting stuck. – Improvements include: – Increased size of 3/4 wrench flats for installation – Extended area behind lugs for use on short barrel rifles – Overall length of 2.4 for use on 14.5 barrels – Precision mounting shim kit included – Built in carbon cutting grooves – Quickmount lugs for use with all GEMTECH 7.62mm suppressors