well elt me put it to you this way. get an american valve and swap it out. its a restreiction mechanism in the valve of the canadian rifle. cant remove it because its built in. however you can bore out the valve a little bit but it is highly risky. also having a bulk adapter will advance the air flow giving you a more constant 450fps instead of dropping off every shot. real fun guns to mod
you can always mod them to look cool or mod them for performace like getting a longer barrel and boring it out to fit the gun adding a fake suppressor to act as a barrel shroud to cover the remains of the barrel.
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Matt
http://www.network54.com/Hide/Forum/246966