Ultradyne UD10690: Made in the USA, the Athena is Ultradyne\'s linear compensator. It gives a cleaner appearance for a sleek look compared to traditional brakes and is the most cost-effective way to upgrade a rifle to the Dynamount Sighting System. Muzzle rise has been optimized, with gas vented at an angle then forward. This sends a lower percent of sound and gasses back towards the shooter, optimizing sonic performance over recoil. A timing nut is included for easy installation.