i used to use this on my piranha but now its on my 2002 rebel bottomline
an upgraded piranha g2 vtl, a 2002 rebel bottomline, and a tippmann model 98 custom with a 16' taso winforce barrel and an expansion chamber.
it works. cheap. comes in a lot of colors.
it doesnt fit into your hand very well.
well.....what can i say? its an expansion chamber. it comes in a ton of colors. its cheap. it keeps your velocity consistent. it makes your gun look cool. it doesnt leak. it conserves co2. it can fit on a variety of guns. im pretty sure theres a 6 stage kind but mines only a 4 stage.
ive had no problems with mine and ive used it for over a year so i guess this means that its a good thing to buy that will last forever.