[Image: http://cache.gawkerassets.com/assets/images/9/2010/07/500x_the_wrangler.jpg]
In case you can't read
The wrangler is an alternative to the engineer's pistol
The engineer can use it to control his sentry gun or who the sentry guns attack, however, they will no longer auto attack.
It can also make a shield for sentry guns that absorbs 2/3 of the damage taken
It can also double the fire rate of sentry guns and increases missle launch rate at level 3.
However, the sentry gun will be inactive for 3 seconds after the Engineer switches from the Wrangler
Team Fortress 2 - Engineer Update
Before you go OVERPOWERED, please know that double the fire rate = more ammo lost
you HAVE to switch from the wrangler to the wrench to resupply the sentry guns with ammo
that means your sentry guns go out for 3 seconds too.
This makes the engineer more of a threat than the sentry guns if he also carries the Frontier Justice (the new shotgun with FIXED CRITS)
This update will help the offensive engineer playstyle