BD MultiGunFix

that allows the proper simulation of multiple muzzle/launch positions for any type of weapon. As of Operation Arrowhead, the engine natively supports multiple muzzles (at least for bullet firing weapons), but this addon is still compatable with those vehicles that use this new native feature, and can still be used for addons if the native solution is not possible/preferable. As of v2.0 of this addon, there is a new feature that allows weapons with multiple muzzle/launch positions to converge on a single point at a given distance. This feature is present for ArmA 2 stand alone, but currently the range can not be adjusted by the player. In Operation Arrowhead, this feature is tied to the native zeroing system; your rounds will converge at the range at which you are currently zeroed. Note: some BIS vehicles that use convergence do not allow zeroing. In this case, a fixed convergence range is used. In addition, this addon includes a system that allows addon makers to easily enable multiple barrels/launch positions for new vehicles using only model and config changes and little scripting knowledge. This file also includes an optional addon to enable zeroing for the 2S6M Tunguska's 2A38M guns (seperate readme included).
In ArmA 2 (prior to OA), there is no native support for multiple muzzle positions for vehicle weapons. This addon provides a set of scripts both for existing BIS vehicles and for new addon vehicles