The CheyTac Intervention is an American bolt-action sniper rifle manufactured by CheyTac LLC. It is fed by a 7-round detachable single-stack magazine. It fires.408 Chey Tac or .375 Chey Tac ammunition. CheyTac LLC states that the system is capable of delivering sub-MOA accuracy at ranges of up to 2,500 yards (2,300 m), one of the longest ranges of all modern-day sniper rifles. It is based on the EDM Arms Windrunner.

 part 2:https://www.youtube.com/watch?v=LkfWj1LapTo