You're M-16 A2 doesn't have a grip (handle). The 9mm Berretta's (I'm assuming that's what it is)skin appears to be off; did you match up the UV coordinates properly? I've never used Anim8tor, so I don't know what the program can or can't do. It's good that you're trying for low-poly, but I think you've went a bit too low; the trigger guard on the handgun should have space between the trigger and the guard; I've seen some people remove the trigger all together to save on polys.
If you know how to use Max, why are you bothering with Anim8tor; just wanted to try something new?
Anyways, not too bad so far, but it needs some work. Keep going
-Keith
"Some people are only alive because it's illegal to kill them".