Functional Iron Sights

Description
the aim button will now raise the weapon's sights and line them up properly so that you can actually aim with them. But wait, there's more! When you're not in aiming mode, the weapon is now held realistically at "low ready", making it easier to take close range shots in the absence of the crosshair, which has been totally removed.

The weapons included are the G36, AK47, Mk23 (dual Mk23's do not have iron sights, for obvious reasons), HK416, M16A3 and SCAR-H (the 7.62x51mm one).