This is a scaled up version of the Vietnam era M16 3-prong flash hider, specifically designed for use on the Tromix 458 SOCOM barrels.
Threaded 5/8-24 and coated with 2400 Series Bake-On KG GunKote. Available in black finish only.
Base diameter .980″
Front diameter .820″
Overall Length 1.76″
Thread Size/Pitch – 5/8-24 only