The AR Optics Transition by Bushnell provides high versatility by allowing the user to quickly switch between a standard rod dot for close range targets, and 3x magnification for mid range targets. The Transition is made for use with the AR Optics TRS-25, but is compatible with nearly any kind of red dot. Features of the AR Optics TransitionAmbidextrous designFlip mount includedPairs well with TRS-25 but works with almost any red dotWaterproof, fog-proof, shockproof Bushnell AR Optics Transition 3x Magnifer w/Flip to Side Mount AR731304