I have been using this on a Spyder Xtra with a dead on drop forward, 48/3000 psi tank, J&J Ceramic barrel, this expansion chamber, Delrin ACS bolt, and a revolution hopper with the X-board.
Strengths:
Very consistant, works great with CO2 or Compressed air, perfect size and grip
Weaknesses:
None that I have noticed
Review:
I have been paintballing for about a year now and have made multipkle upgrades on my Xtra. Right after I got the gun, I started chopping paint, so I immediately went for the Delrin ACS bolt. I still chopped about 1/4 of the balls I shot, so I went with a new barrel. I 'upgraded' (not really an upgrade after I saw the performance of it) to a Smart Parts progressive barrel and was still chopping paint. I finally got a J&J ceramic barrel and have fallen in love with it. I noticed that my shooting was very inconsistant, so I began looking at expansion chambers. I found this sub zero at the local drop zone for $30, so I went with it. I bought it a week ago and have played at least five times with it. I have had no problems since. No more chopped paint, no more velocity spikes, but it has done wonders to the accuracy of my crappy mechanical marker!
Conclusion:
This expansion chamber has done wonders to my entire game and I recommend that if you have the money ($30-40) to not hesitate and buy the sub zero...TODAY!!!
