Quick follow up, since there were some negatives on that initial review.
Got to play at a local big game this weekend (DBS "Stalingrad") and had a blast. Gun worked flawlessly, with an older Halo-B, up until I loaned it out for the last round of the day...at that point it got the first breach break of the day, but that may have been operator error...somehow.
Anyways...the long and the short of it is, it's a great modern semi, but I've had the teething problems typical of a brand new marker. Nothing I can really hold against DYE. Breach breaks suck...as they do on any non-stacked tube...but it's as fast as you want it to be, and quiet. A bit of a gas hog. In short, a spool valve. Oh..and it shoots first strike