The Bushmaster Adaptive Combat Rifle (ACR) offers users advanced features such as firing pin block and a true ambidextrous charging handle. Other key features include a gas piston operating system ...

The Viper ACR manages to hold its relevancy despite the ever-growing segment of roadgoing race cars, and in this video, Throttle House takes it to the track to see just how special it really is ...

In ZB Phase II ACR guise, the Viper was now a bona fide all-around driver's car that could lap that could lap the world's most technical race track (Nürburgring) in 7 minutes and 12.13 seconds.