Pros:

Great Job!
Awesome Port!
These could work great as zombie replacements
Maybe turn the Fast Zombie into the Hunter and the Poison Headcrab into the tank or boomer.
Maybe Zombine for Riot Zombies

Cons:

None that I can see, the mods does exactly as it states replace zombies with Headcrab Zombies
Could maybe fix the headcrab on the fast zombie

Conclusion:

I suggest also replacing the sounds to for added immersion!

EXCELLENT JOB

Pros:

Its an M16 my favorite gun of all time!
It looks like its straight from BF3 one of my favorite games.

Cons:

I hate that Reflex sight, I like iron sights.

Conclusion:

The gun is well made and very very smexy, but I can't stand that reflex sight.

Pros:

its pretty damn funny
Its just the right volume (Personal Opinion maybe)
I hate the Jockey so this fits (Personal Opinion)
The First of its kind no one else made the Trololo Song for the Jockey.

Cons:

None unless you don't like Trololo, but then why would you be here?

Conclusion:

Overall just get it if you came here and you were interested in the Trolololo Song, just click download and being the lul. Its easy to install just place in the Addons Folder!

R.I.P. Eduard Khil

Pros:

they are m9s

Cons:

From what ive been told you stole A LOT of stuff and gave NO CREDIT

Conclusion:

Make your own shit, oh and grow up