Arma 3 Wiki

Weapons
Every one of the 70 weapons a soldier can carry, with its fire modes as rounds per minute, the magazines it accepts, the rail standard at each mounting point, and a hold table computed from its own round.
Ballistics
How the game flies a bullet, all 16 ballistically distinct loadings in one table, and a calculator that turns a zero and a target range into the hold to put on it.
Vehicles
140 cars, tanks, aircraft, boats and static guns, each with its armour, crew and cargo, and every weapon station it carries with what that station is loaded with.
Ammunition
The 12 cartridges in the game, and for each one every weapon chambered for it, every loading of it, and every magazine that holds it.
Terrains
The 5 maps, full size, with all 500 named places listed underneath and the coordinates to find each one.
Attachments
Optics, suppressors, pointers and bipods by the mounting point each one uses, and which weapons offer which points.
