I have an A-5 with an RT, Double trigger, expansion chamber, and a Armson stealth barrel.
Its intimidating! If your cornered you just blast them all away.
When my CO2 gets low the RT dosn't work as well.
If you don't have an RT you must get one. Yeah its expensive but its worth every cent. I have been using it for 3 months and so far i havn't had any problems at all. A couple of weeks ago I went to a war and played with the RT and I came out on top but my friends E-grip is pretty impressive.
This RT is great! Its fun to install and very very intimating if you play with a bunch of newbies!