The G36A CAMO was released in DayZ's latest patch 1.7.5.1.
The G36 is a 5.56×45mm assault rifle, designed in the early 1990s by Heckler & Koch (H&K) in Germany as a replacement for the G3 battle rifle. It was accepted into service with the Bundeswehr in 1997, replacing the G3. The G36 is gas-operated and feeds from a 30-round detachable magazine or 100-round C-Mag drum magazine.
The Mod:G36A and the Mod:G36K in Arma 2 features a dual scope feature. Apart from the standard acog/zoomed scope, it can be switched to a Red-Dot/reflex sight by pressing the "/" key on the numpad (can be changed in the "controls" option). This makes the weapon versatile and effective in both close and medium ranged combat. Combined with the relatively low noise of the weapon makes it one of the most effective assault rifles in DayZ. It utilizes the NATO-standard 5.56mm cartridge, but uses the G36 magazine instead of the more common STANAG Magazine.