That is an EF88, or more generically, the AuSteyr. The modern, Australian made and modified version of the older AUG platform. The giveaway is the kink you see in the trigger guard. No other type of AUG has that. This artist has an eye for detail- you can see the plug in the trigger guard, which can be removed so you can add an underbarrel grenade launcher.

Somebody aliased multicam to woodland_camouflage, which I really don't think is appropriate. That's not really accurate on a literal, technical, casual or visual level. Even less here. The exact name of the type is the "Australian Multicam Camouflage Uniform (AMCU)". It's a Multicam derivative. Australia doesn't have "woodlands" like you see in the US or Europe. It's very arid. When people hear "woodland" camouflage, they're going to think M81, which was literally called woodland. It's very dark, very green, very different.

Danbooru isn't a mil nerd site, but things like M81 and Multicam are definitely common enough and obvious enough to deserve their own tags, imho.