Found this as an alternative to the typical "Vegas lets shoot guns!!".
The front desk staff was friendly and professional over the phone. The War Wagon pick up was on time and fun as hell.(Tip your driver, he doesn't have A/C either.)
We went as a party of four but it appears that they can accommodate much larger groups with ease. Our Spec Opps leader was Hawkeye. As he so eloquently put it he's so tough that he "beats tigers till they're retarded." (Yes they have a hardened military man's sense of humor, if you take yourself too seriously you may be offended.) That being said, the guys and gals @ Adventure Combat Opps all seem to genuinely want to make sure that you have a good time. And if you are open to a good time you will!!
The experience is much like a combo of VR Video gaming, military basic training and paintball. They've taken a lot of time to make it a fun interactive zombie killing free for all.
To the men and women of Adventure Combat Opps. I'd like to say thank you for a truly fun and fully engaging day in Vegas.