percussion muzzleloader

buying a muzzleloader>>> what does flint lock mean? what does percussion mean? what is the difference?
most detailed awnser gets 10 points!!
With traditional sidelock muzzle loaders a percussion firearm has a drum threaded into the firing chamber and a nipple threaded into the drum. A percussion cap is placed on the nipple. The hammer falls and strikes the cap when the trigger is pulled. Flame goes from the cap through the nipple and the drum into the chamber where the powder is causing the weapon to fire. A flintlock has a hammer with a set of jaws that hold a piece of flint. Instead of a drum and nipple there is a small pan fine powder is poured into and covered by a piece of metal called a frizzen. It is L-shaped so part of it covers the powder and part of it is upright. When the trigger is pulled the hammer falls and the piece of flint slides down the upright curved part of the frizzen causing a spark, also the pan to open. The spark goes into the powder in the now open pan and ignites the powder. A small hole (touch-hole) goes thru the barrel at the pan, the flame goes thru the touch-hole from the pan into the chamber holding the main charge, and the weapon fires.
All in-line muzzle loaders are percussion.
muzzleloader 9 bore