muzzleloader mossberg 500?

[zach1234]

So I'm trying to understand the rules in washington state.
I wanted to get the mossberg 500 barrel for muzzleloder but am not sure if it meets the rules and regulations.
this is the one in ?
Ignition is to be wheel lock, matchlock,flintlock, or percussion using original style percussion caps that fit on the nipple and
are exposed to the weather. "Exposed to the weather" means the percussion cap or the frizzen must be visible and not capable
of being enclosed by an integral part of the weapon proper. Primers designed to be used in modern cartridges are not legal

here is the link to the barrel i was looking at
http://www.midwayusa.com/viewProduct/?productNumber=861787

thanks for the help

[bobcat]

It uses 209 primers for ignition, that automatically disqualifies it, if nothing else does.