Be aware, there are currently a number of counterfeit Dueck Defense RTS Sights currently being sold on eBay, apparently being marketed at the MilSim community (no, not interested in an all-encompassing “Airsofters are evil” diatribe). We first mentioned the Dueck RTS in Dec of 2010. Effectively, they can work as backup sights or as dedicated transition sights for close in targets when your carbine is equipped with a scope. In fact, the RTS replicates the M16-style front and rear sight system many are used to from their time training with issue weapons just mounted on a 45 deg offset.
If you’re looking to purchase one, ensure you are getting the real thing. Dueck Defense RTS Sights are made in the USA and are ISO Certified. You can find the real thing on the Dueck Defense website or through SureFire.
Here’s a video of the sights in action:
-DR with input from GS