Fortress tip out the windshield for the Polaris 900 models is a solid option. Simply put, it allows for a mode that keeps the windshield all the way open, or a vent mode (approximately 5 inches outward) allowing just air circulation.
No noise, no rattle, no squeaks! Works with most roofs on the market including our Ranch Armor metal tops for the Mule Pros. 2 gas shocks hold the windshield up when in an upright position. The handle used to lock the window down also acts as the prop lock to hold the window in "vent" mode.