This is a Yankee Hill Machine Co Flash Hider known as the Phantom LT/LTA 7.62 Q.D. Flash chambered in 762NATO, model YHM-4302-28A.
This flash hider is used for YHM .30 Cal. LT/LTA suppressors. It retains the excellent flash hiding capabilities of the original Phantom
Features:
Devices should be torqued to between 20 and 30 ft-lbs