In the Military they told us to always be prepared. It got to where I hated hearing that, but it still rings true today. While today's optics are technically advanced and work better than ever, they are far from foolproof. When they fail you should be prepared. The best way to do so is to have a set of backup sights mounted, just in case.
The Troy DiOptic Rear Sight is one of the toughest, battle-ready sights you can have on your weapon. The Troy DiOptic sight is an aperture sight. Although the design is nothing new, the Troy DiOptic Rear Sight does things that nobody had even thought of when they first appeared.
Troy Industries takes target acquisition technology to a new level with their Di-Optic Aperture (DOA) Folding Rear BattleSight. A toggle mechanism allows you to switch between the two apertures. The front of the aperture on the Troy DiOptic sight is concave. This funnels available light to help in target acquisition, while simultaneously minimizing glare if you're shooting in the bright sun. The larger of the two apertures feature white crosshairs, that along with the design, naturally draw your eye in centering the target. One aperture is made for shooting at up to 200 meters while the other is intended for use at up to 600 meters. The diamond-shaped apertures have been designed to facilitate lightning-fast sight orientation.
This rear back up sight is built in accordance with Troy's strict quality standards. The 6061 aluminum and stainless steel parts are coated with a Type-III hard coat anodizing. This rear sight even folds down to stay out of the way when you're using an optic!
Sights like the Troy DiOptic folding sight prove to be faster and more accurate than standard open sights. The Troy DiOptic folding sight attaches quickly to any receiver wearing a top Picatinny rail. When you raise the Troy DiOptic sight you'll hear an audible click as it locks into place, as solid as a rock. When folded, the Troy DiOptic Rear Sight is less than a ½ inch high. It's both durable and dead-on accurate. The Troy DiOptic Rear Sight is a superb option whether you take your rifle on duty, on hunting trips, or just down to the range.