Tranquilizer Gun
Headshot = 3 second knockdown
Body shot = CS gas effect for 5 seconds
Limb shot = No effect
Gun must be cocked after each shot which takes 1 second and has 3 ammo per magazine
This would be pretty neat, it be cooler (in my opinion) if the knockdown lasted a bit longer, blurred your vision while knocked down, and made it to where you can't speak for a small period of time. Basically, the gun would actually tranqualize someone, which would be cool for some non-lethal gameplay, kind of like the breaking and entering mission from Uncharted 2.