One optic for every gun in your arsenal. It's no distant dream-the VortexA(R) Defender-ST makes it a reality. It's the ultimate all-purpose red dot designed to fit and function flawlessly on everything-from EDC handguns to shotguns, paired up as the primary optic on your carbine, or piggybacked on your AR's LPVO. Rugged and reliable? It's a given. Large sight window? Absolutely. Motion-activation and a dot with adjustable brightness deliver superior target acquisition, adaptability in all lighting conditions, and faster follow-up shots. The 7075 aluminum housing features a polymer Shockshield that absorbs impact to keep you in the action. And the Defender-ST is 100% waterproof, fogproof and shockproof to operate in any theater. It fits the standard DeltaPoint Pro footprint, and includes both a Picatinny mount and Glock MOS adapter plate-so it's a perfect fit on a huge variety or platforms. If you want one optic that does it all-the Defender-ST is it. WITH THE VORTEX VIP WARRANTY, YOU GET A VERY IMPORTANT PROMISE To put it simply, no matter how it happens, or whose fault it is, or where you purchased it, if your product ever becomes damaged or defective, Vortex will repair or replace it at no charge to you. This Unlimited Lifetime Warranty is fully transferable and covers all Vortex Optics. There is no card to fill out or need for you to keep any receipts. We will repair or replace your Vortex product in the event it becomes damaged or defective at no charge to you. If we cannot repair it, we will replace it with one in perfect working order of equal or better physical condition. That's it. Designed to work with pistols, shotguns and tactical rifles 3 MOA red dot reticle with manual adjustable brightness Large aspherical lens for distortion-free sight picture Motion activated to be ready to go in an instant 7075 aluminum housing with polymer Shockshield that absorbs everyday impact 100%