The Community Upgrade Project is an initiative to bring all the content of ArmA 2
[+ OA and DLCs] from BI into ArmA 3, upgraded to the ArmA 3 feature set.

Its goal is to provide those assets to the community as a mod ready to use in the game. Cooperative and coordinated effort to get a coherent port of ArmA 2 content
[+ OA and DLCs] from BI to ArmA 3 standards. Release of the content in a coherent way Content CUP currently features the following listed projects. Please report bugs at our bug tracker - bug reports in the forum tend to get overseen. All downloads as well as classname documentation can be found on our website.   Starting with version 1.8.0, CUP is licensed under a new license.   CUP Weapons CUP Weapons contains all the weapons, assault rifles, machine guns, shotguns, grenade launchers, pistols, sniper rifles, and whatever else goes "boom" in ArmA, ArmA 2 and the expansion
and DLC's. All weapons are stripped of their attachments were possible, and these have been turned
into attachable scopes, lasers, flashlights, and bipods interchangeable with the vanilla content. Some of the weapons are new or derived from the original ones.   CUP Units CUP units contains all the units of the original ArmA, ArmA 2 and Arrowhead as well as the DLCs. All factions are fully functional, and they will be upgraded (and possibly expanded) over time. All uniforms and vests are compatible with vanilla content, meaning that you can mix vanilla and CUP content.     CUP Vehicles CUP Vehicles contains all the vehicles from Arma 2 and the expansion and DLC's. All vehicles are ported with ArmA 3 standards and features.     CUP Terrains CUP Terrains, the successor of "A3MP" and "All in ArmA - Terrain Pack (AiA TP)",  builds upon the work done by kju for AiA TP and brings all of BI's iconic terrains to ArmA 3 as well as support for all the amazing 3rd-party terrains created by the community. CUP Terrains maintains full backwards compatibility to A3MP and AiA TP - no need to adjust any missions or maps. CUP Terrains has its own thread here.