[Extended scope mount on slug barrel?]

AHHH...thank you so much, you have just helped sell another outstanding firearm.

[Extended scope mount on slug barrel?]

Im almost sold on the SBE II, but for the price and awesomeness of it, plan on using for waterfowl and deer. My only question is does the slug barrel come with an extended scope mount or does the scope have to mount to the reciever. If there is no ext. scope mount can you still aim efficiently with the scope mounts on the reciever when hunting for waterfowl? If anyone has any input I would really appreciate it.