I am not a modeler i don't know what good work is and what bad work is, but in my opnion is this really amazing and usefull.
If i was you would i continue the SWAT Production, or
make some Counter Terrorist's or Terrorist's you decide
(Kinda funny walk animation LOL )
ill be making some terrorists maybe, but since im back to school now i got homework n stuff to do.
im currently animating a WoW model to be a sorta sci fi badass guy... itll also cut down on the models file size.
great job, this guy is INCREDIBLY useful, please make more modern units ! lol his walk animation is a little silly, but it works just fine, his attack animation is cool, i think he MIGHT vibrate just a little too much, but nothing worth fixin
the gun looks really umm... Rambo-ish to be a SMG. maybe get rid of that handle thing at the front, it makes the gun look like a big shotgun, or make the whole gun look slimmer and lighter.
Also the square, big magazine gives an assault rifle-ish look.
i really like the attack animation tho.
I think you should make the helmet cover the whole face and fully hide the face under the glass (because it's awful and we don't need to know how does the guy really look. +The untransparent glass will give the swat a serious and smart and versatile image.) And make him not an SMG but a Shotgun like this: