After a bit of digging on Google using Pedersoli + Frontier I found an Italian web site showing all of the long arms they make.
By clicking on the Frontier and doing a bit more digging into their offerings I came up with a lot of information in Italian plus a PDF file showing the exploded view of the guns parts.
http://www.davide-pedersoli.com/sc...frontier-frontier-maple-percussion-model.html
Notice towards the bottom on the right side there is a "download" and a PDF symbol. Download it and save it on your computer to see the exploded view.
Based on this there appears to be two barrel lugs on the bottom of the barrel that align with the ramrod thimbles. A screw is shown going thru the thimbles and it looks like they would screw into the barrels underlugs.
Remove the ramrod and the screws.
Also, as was mentioned in another post, loosen the screws that hold the lock in place.
With the lock screws loosened, tap their heads with a plastic handled screw driver. This will start to drive the lock out of the stock.
Loosen the lock screws further and repeat the tapping until the lock and the screws are removed.
Once the lock screws are removed you may have to remove the screw at the breeches tang to remove the barrel.
As was mentioned, use a degreasing agent like disk brake cleaner to remove the shipping grease from the bore. Be sure to oil the bore with a good rust preventative after using the brake cleaner or any time after you clean the bore.
Inspect the inside of the lock and lubricate all areas where parts move.
Reassemble your gun and your thru.
I know your going to enjoy shooting your gun and hopefully you will read the information about shooting black powder guns here on our forum.
Enjoy!