There is about 25cc of volume inside the pump tube and another 20 in the CO2 cartridge used as a reservoir.... for a total of about 45 cc....Bob
One setback guys...it was brought to my attention by one of the airgun TV shows (I e mailed them to see if they'd like to review a rifle) that there's already a firearm called the *Millennium*...I Google searched it and its the Millennium line of pistols from Taurus.I am trying to contact them to make sure its not an issue naming this air rifle the Millennium, as I don't want to buy myself a lawsuit Hopefully they agree and put it in writing...otherwise we will have to come up with a new name for the rifle before I send the breeches out for laser engraving.I'm open to suggestions while I wait to hear back from Taurus International...Mike
LOL @ B.F.A.R.! I get it I will check the trademark - maybe it's a non issue.Mike