Sightmark Flip-to-Side 30mm Mount
Sightmark 30 mm Slide - to - side Ring. Fits 30 mm magnifiers! The slide-to-side motion of this unit was created so you can use your 30 mm magnifier for long-distance shots and quickly move it to the side to use the 1X magnification of a reflex sight. Quick-detach lever. Made of tough aluminum. Backed by Sightmark's Limited Lifetime Warranty. Order Now! Sightmark 30 mm Slide-to-side Ring, Matte BlackThe QD mount tension is adjustable.  Flip it open and rotate it clockwise or counter clockwise.  Rail mount sticks the may have it too tight.  Or use gun oil and apply it to the moving parts of the QD mount. The tension on the slide to side is also adjustable by loosening or tightening the set screws on the front and back of the mount.  May have been set too tight at the factory