Nerf Snapfire 8!

Like other newer Dart Tag blasters, the Snapfire does not feature a tactical rail or any support for use with barrel extensions or detachable shoulder stocks.

The Snapfire features a knob on the bottom of the blaster's handle that allows the user to slightly adjust the blaster's spring length, changing the power of the plunger. The side of the handle has a small indicator to show how far it's been adjusted. One end of the scale is Speed, where the spring is more slack, which allows the trigger to be pulled more easily but decreases the range. The other end is Power, where the spring is given additional tension, making the trigger more difficult to pull but shooting the dart further. The dial can also be adjusted to a point between the two. 

The way it is able to shoot semi-auto while not requiring batteries is fairly complicated: As hinted by the long trigger pull, pulling the trigger pulls back the plunger tube, and when it reaches the end, releases it, causing the dart to be propelled out of the barrel. The adjustable length of the spring means the trigger varies in how difficult it is to pull. 

With the dial set to speed, ranges will fall between twenty-five to thirty feet flat. With the dial set to power, ranges will average around thirty-five to forty feet flat.   

I am not sure when this gun will be released in the UK but in America I think it has been released!