Heres how old she is; guess for yourself.. (92-94ish?)
As for the muzzle brake and expantion chamber, the brake I got from Bacci's parts sale and the chamber is somthing I just had lying around when I got the marker. I've heard the older ones are a bit better with co2 that way. Works for me fine anyway.. Somthing I like about that chamber a lot is that on the bottom of the chamber, there is actually ANOTHER asa built right in. I've never seen another one but I think it's a great design. And the way it's angled, a 20oz-sized tank fits perfectly under the gripframe. I might change it someday but it balances out pretty well for now.