This is a Ultradyne USA Brake known as the PEGASUS chambered in 308 Winchester, model UD10700.
PEGASUS has been meticulously engineered to provide superior recoil reduction and neutralize muzzle rise with a smooth" balanced release of blast energy in a tanker-style compensator. Progressive 90 side ports vent combusting gases at intervals that spread out the recoil impulse for efficient" accurate follow-up shots. Like all Ultradyne muzzle devices" a timing nut is included for easy installation.
Features:
5/8X24 thread pitch
CNC machined
416 stainless steel
Nitride finish
Includes timing nut