What Whisker said, the downside is it cannot upgrade, but it builds VERY fast ie, level one sentry built in one second about.

would be nifty at certain times to be able to setup more than one sentry... 3 Level 1's, 2 Level 2's, or 1 Level 3... 2 level 2's would be murderous though... hehe
Sounds like a lot of phail to me. horray a lvl 1 SG, what is that mr pipe bomb? I'm dead? Oh yea, I'm dead.
ROFL Yeah, it was a good idea in TFC to have a key bound to discard your excess ammo. Not only was it about the only way to keep a forward engy supplied (today's dispenser is a vast improvement) but dropping that extra ammo meant you could survive an EMP blast with little damage. Except for the hapless pyro; the FT used metal as fuel so just being at the edge of an EMP blast was certain death. The EMP effect could also go through walls so somewhere, someplace, a pyro was sure to die.I think they should bring back the EMP grenade