HyperMetal's AK animations rigged to the L4D arms by arby26, who also created new idle, run, look up/down, shoot and melee anims. Huge thanks to him for porting these awesome animations, and HyperMetal of course for creating them in the first place. The sounds are also included, and must be manually installed.
The weapon script I'm using (30-round magazine and increased rate of fire) is included as a separate addon. In my opinion, it makes the gun feel more like an untamed beast.