As you can see from the picture, the BBs flight path appears red, yellow, green, blue and then green again as it travels.

In this post, we’re going to look at the Acetech Bifrost Tracer Unit from Extreme Airsoft and find out if it really is all that or just a gimmick. The Bifrost from Acetech is designed to not only simulate muzzle flash with a multi-colour flame effect but also provides us with a rainbow BB flight path. This is in addition to your rights under the Consumer Protection (Distance Selling) Regulations 2000.ACETECH has been leading the industry in the tracer unit segment with unique designs and innovative technology. The Bifrost provides coloured BBs track function which can be achieved by standard BBs with the built-in RGB Flame LED.

The ultimate tracer unit, have that realistic flame or plasma blast if you own a sci-fi airsoft gun, even with normal while bb’s in low light you get the effect.Whether it's a pistol, rifle, sniper, or machine gun powered by AEG, HPA, GAS or Spring, each of these beasts needs quality feed, or they'll be naughty. The flash from the rows of lights in the tracer unit “excites/charges” the Phosphor making the BBs glow meaning we can see where the BBs travel.

The mode button is the on/off button, although it does have sleep mode so don’t panic too much if you forget to turn it off after a skirmish. As you can see from these screenshots when I tested the single colour modes with white BBs, the blue has a much brighter flash than the purple, but both BBs did glow the designated colour for the same distance.With its advanced features and easy-to-use design, this tracer unit is an essential accessory for any airsoft enthusiast. These units come in a few different forms but the flash hider/threaded tracer units are the most popular. The unit mounts to 14mm CCW male threaded barrels but also comes with an 11mm CW to 14mm CCW adapter, meaning it can also be mounted on any pistol with 11mm CW female threads.

The Bifrost offers a plethora of functions including muzzle flash simulation, selectable colours for the LED array, Rainbow and Dynamic Rainbow mode as well as the option to run the unit as a simple tracer unit for when you want to be more discrete and sneaky. When you are in "Standard Mode" you can select the colour of your muzzle flash using the Flame selection button inside the case of the Bifrost, with Rainbow, Dynamic Rainbow, RGB and various single colour options to choose from. It is powered by an internal Li-Ion battery that fully charges up to 24,000 bbs or 12,000 in lighting and flame imitation mode. The second mode is known as "Sniper Mode", and will illuminate your BBs but keeps the muzzle flash turned off to aid in concealment.

All content including text and images unless otherwise stated are my own and are subject to the Copyright, Designs and Patents Act of 1988. Now the BB still glows green but for the first few feet, there is a rainbow flash so it does look like a rainbow BB. However, the most interesting feature of Bifrost is the simulation of a flash from the muzzle, especially when shooting with a multicolor effect. This act requires that anyone who wishes to purchase a RIF must have a "legitimate defense" for doing so. The flame button controls the colour of the ‘flame’ and it has the following colours/functions: red, orange, yellow, green, blue, pink, purple, RGB (where the flame flashed red, green and blue), rainbow and dynamic rainbow.