Weapons ID please?

In particular, the held weapon on the right. 1) Might it be a modified example of either an M4 or HK 416? 2) Is that a dual-drum magazine?

Ah, the .45 kriss.

Anyways, the rifle is certainly a memeber of the CAR-15 family. And yes, that's a standard 100 round dual drum magazine (SSS engraved too). However, since the handguard is not uniform with the upper receiver, then this weapon is not a Heckler and Koch 416 (its also missing the trademark rotating rear sight, but even this can be simply removed). Therefore, my best guess is that this is just a M4 RIS CQB Rifle due to its short barrel and tac rails. The most trademark part of that weapon is the forward assist and the dust cover design, so this is most likely a M4 of some stype. Hope this helps! :D

For the M4, probably Mk 18 Mod 0 CQBR, the modern equivalent of the Colt Commando.

Yeah, but with all those companies making the same M4 styled rifles, you can't be sure unless you look at the engravings on the magwell. But there's no way the artist would be that specific XD

Yeah, but with all those companies making the same M4 styled rifles, you can't be sure unless you look at the engravings on the magwell. But there's no way the artist would be that specific XD