I voted, but I did not like the choices. I selected everyone use the Beretta. Folks here are talking about stopping power and clearly no one is going to dispute the power of 45 vs 9mm. However, the magazine size is an issue for me. They should have considered a double stacked alternative and the 45 would have been a clear winner. That being said, they should have considered the Beretta 96 (40 cal). No training or muscle memory changes, more power than 9, way more capacity than 45 single stack. Finally, if you have to pull a handgun (which is not your weapon of choice in CQB) that means your M4 or other SBR is out of ammo, and you are in deep stuff anyway. At that point 45 or 9 may not matter (and if it does, I want more than 7 or 8 rounds).