Acetech is one of the leading manufacturers of tracer units in airsoft and, in our opinion, the Bifrost certainly lives up to the company’s reputation. 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.To access the button, simply unscrew the rear cap to reveal the charging port, the Mode selection button and the Flame selection button. The Mode selection button allows you to scroll between Standard and Sniper modes, and the Flame selection button lets you choose the colour of your muzzle flash. The charger port is of the USB Type-C variety and the cable to charge the unit is included in the box. It features IP65 protection for use in the worst of weathers, shake to power on which is particularly handy for when used inside outer barrels, and most importantly, provides a tremendously bright tracer BB.

Acetech have designed a whole new type of device, a tracer unit which has the added feature of simulating multi coloured muzzle flash. The tracer unit has RGB LED's at the end which are programmed to flash as the BB exits the barrel. Tracer BB's are not required for the muzzle flash setting. If there is any dispute about or involving Evike.com's services or products provided, you agree that the dispute shall be governed by the laws of the State of California, USA, without regard to conflict of law provisions and you agree to exclusive personal jurisdiction and venue in the state and federal courts of the United States located in the state of California, City of Alhambra. As we’ve mentioned, the Acetech Bifrost is powered by a lithium ion battery, rather than the usual AAA/AA batteries seen in some other devices. In general, we found the Acetech Bifrost to be able to illuminate green tracer BBs brightly and accurately, giving them a strong and long lasting green glow that should help users in low light conditions. Tons of cool featuresThe device’s LED system will light individual BBs passing by up to a rate of about 35 RPS (a bit more than many competitors, which tend to top out around 30 or so RPS), making it a pretty solid option for the majority of airsoft guns, with the possible exception of some custom AEG and more high speed DSG builds. Where the Acetech Bifrost really stands out as an airsoft tracer unit is in its rather extensive set of features.

Interestingly enough, the Bifrost is actually water-resistant (there is a nice rubber O-ring beneath the crown), which, aside from adding a bit of extra protection from the elements allows, the device to be used with water-based gel BBs as well as traditional plastic 6mm ones. The Acetech Bifrost tracer unit redefined what a tracer unit can do, combining tracer functionality with realistic muzzle flash and then spicing things up with a whole spectrum of colour options and the ability to make standard white BBs glow like a rainbow for the first meter of so of their journey down range.The Bifrost has also been designed with some helpful and useful battery-related features, such as a low battery light function that alerts users to the need for recharging in a highly visible way and a “shake to wake” sleep mode that can help it last longer between charges. Cons Not the cheapest unit out there

We say so-called sniper mode because, once set to this, the Bifrost will illuminate every 3rd shot or so, which isn’t exactly something that most players relying on stealth and quiet positioning will really want to be doing.

Helpfully, Acetech has fitted the device with a low power indicator, with its LED’s flashing yellow to let you know it needs to be plugged in.