You just shoot them until they collapse, they are not particularly sturdy.
in call of duty modern warfare 2 a sentry gun requires 5 kills or if the perk hardline is applyed 4
You give one of them your sentry gun find it and destroy it
Air Drop Sentry Gun Emergency Air Drop
im not sure which one your on about but if you throw a flashbang and then shoot, or even better melle it and kill it in one.
The Sentry G5241 14 gun safe weighs 170 lbs (according to the Sentry website)
Contact Sentry or a qualified locksmith.
When th ammo in the sentry gun reaches 0, then you can reload it. To reload, walk on top of the sentry gun and press the F key. I'm not sure if you can reload it when there is still ammo in it though, but you can try. When you reach the rank Colonel, once you set up a sentry gun, you will have double ammo for the sentry gun, and you can reload it faster.
You will need to contact Sentry or a good locksmith.
Once you become a Colonel you unlock the sentry gun engineer perk. It allows you to reload sentry guns faster and they start off with more ammo.
the people kill the people...the gun is just making it easier
First you have to get 5 kills or 4 with hardline to get a sentry gun (with it equipped as a killstreak). find a seluded spot, press right on your d-pad through your marker and a sentry gun will fall down as a care package
Have a licensed locksmith call sentry safes and they will give them the combo.