Christmas countdown= Vibe maulin' muppets!! Ooh Ha Ha!!
Now some "chinese" and some American CO2 tanks don't have the 1/8" N.P.T. female threaded in the pin valve adapter. Anti siphon gives more consistancy because of utilizing the vapor, if you install or turn on your bottle with the marker barrel up, 95% of your shots should be consistant(IMHO). Greeat thread !!!!!