Slingshot Compstick Bar with Sentinel 2018: The Sentinel system is designed for riders who like the Compstick’s simplistic and rugged design but prefer an above-the-bar location of the depower rope. The Sentinel features an adjustable trim cleat above the bar, a swiveling safety mechanism below the bar and all the other features that have made the Compstick Sentinel the trusted choice for riders around the world, year after year.