a mini sentry wont fire when you move it :L

The Mobile Sentry Gun is like 3 mini sentry
is the same as heavy .. it fire when it move..???..

I think the main difference is to provide a different gameplay, especially very fun to play as engineer. Only one game in the world provide a third person controled "mobile sentry" it's bulletstorm during 5 minutes in a sequence where we must remotely control a dinosaure with a sort of wrangler.

Good engineers in open area following a pushing team could be very efficient to harrass the enemy team if the incoming spies are stopped, the sentry is more efficient than a heavy in long range.

teen_wolf30: the mobile sentry will not have as many HP of a mini sentry with the shield, that makes it less offensive. But the mobile sentry can hide and attack and be repaired, escape or follow, it's more durable, a different approach.

cool

..... when i switch off to heavy, you wont have a teleport nor dispenser. This is a way for the engineer to guard his nest, AND be on the front lines

& + the enge neds sumthing new...

...ummm... sumthing