Dueck Defense, makers of the Rapid Transition Sight have added a couple of new options. The RTS as originally developed by pro shooter and former Marine Barry Dueck consists of removable M4-style front and rear sights designed to mount at a 45° offset so that the carbine can be rolled off the primary sight to the RTS. The Mil Std 1913 compatible RTS can be used as back up iron sights (BUIS) or for close in engagements when using a powered optic for distance shots.
Regardless of model, they all feature a common rear sight as found on the M16A2/M4 with adjustable drum as well as the same front sight tower found on those weapons. Both right and left versions are available and now they’ve introduced two new options.
This is the Fiber Optic Sightlink version. Sightlink is manufactured by Mounting Solutions Plus and incorporates a fiber optic insert in Red, Yellow or Green.
The model above integrates the Trijicon Bright & Tough Night Sights.
In addition to purchasing the RTS reconfigured with these new sight options, you could also change out the standard GI-type sight components to use these or other sight inserts.