Pros:

They are back! XD

They have the original l4d sounds when fired

The Animations from the SW5906 are a great addition and suite the weapons very well

L4d2 survivors, Zoey,Louis, and Bill all hold them very well in 1st person view

Both sets of survivors hold them well in 3rd person view

Fits in holsters

Cons:

Francis Has some clipping, the back end of the guns goes into his hand, but this isn't really major, since alot of mods that do this have clipping, not to mention, some of the models from l4d2 clip with l4d1 characters already (Desert eagle, I am looking at you, and you too original pistols!)
So i will not deduct points !

Conclusion:

Arby, you are awesome! I don't know what else to say, but that you have made ALOT of people happy today!
Thanks alot, and keep it up!