Nerf Retaliator

The Retaliator features one tactical rail on the priming slide. However, when the included barrel extension is attached to the blaster, there are two additional tactical rails on top and below the barrel. It also has sling attachment point on the handle for use with carrying accessories, as well as room for one spare dart in the handle. At the end of the blaster and on the stock attachment area, there is a priming indicator. On the end of the barrel extension there is also a flip up sight.

Source: http://nerf.wikia.com/wiki/Retaliator