If you use only one brand of ball I would get a better barrel sized for the paint. If your not stuck on a certain brand paint stay with the stock barrel.
If your into speed you need a power hopper, the E2 shoots faster than gravity can feed the gun.
Cold weather ability
60 sec field strip
High co2 mileage
May have wrong O rings installed.
Check all screws prior to use.
I purchased two E2's one year ago and my son and I have run them hard in every woodsball scenario imaginable. Several weeks ago we broke them out of winter storage and headed out with another group for woodsball. The temp dropped to 24 degrees, the E2's were the only guns still shooting with enough velocity to hit anything and still break a ball. This is probably due to the over-sized LP chamber and expansion chamber.
We have used them in hot weather and never had anything blow up as stated in other reviews on this board. I did have one O ring failure in the expansion chamber, this was due to the incorrect O ring installed at the factory. I removed the expansion chamber and screwed a 9 oz tank on the same port and carried on, lost about 5 minutes of game play. The trigger failed on this same gun last year due to a bad trigger pin, the steel pin was of incorrect temper and bent. Both of these problems were minor to say the least and were quickly addressed by Bargain Paintball.
After cleaning my sons gun after yesterdays mudballarama I discovered just how tough the E2 is. The bolt and chamber were fouled with mud and water yet the chamber suffered no wear or scratches. I replaced the bolt O rings(bottle type) to be on the safe side incase there was imbedded dirt in them. The gun functioned fine during the game and after cleaning.
I can't say I've never broken a ball, you get what you pay for. We shoot allot and if the paint is sorta round we use it. I do have a 16 inch straight riffled barrel for my E2 but found the stock 12 inch barrel better unless you buy the premium paint.
I can find no inherit fault with this gun. As stated I own two and with the new lower price I plan on getting another. Who ever assembles the E2's needs to pay a little more attention to O rings and at least attempt to tighten all the screws. Some say its a spyder copy, Wrong, its a spyder copy on steroids and if the system ain't broke .......