There are basically two kinds of "kits".
The ones made by companys like Traditions, Lyman, Pedersoli, etc. These are production guns which have been almost finished except for the stock and perhaps the blueing/browning on the metal parts.
The Lyman Great Plains Rifle Kit is a fine example of a high quality kit of this kind.
To finish one of these, all you really need is a couple of screw drivers, a lot of sandpaper, some stock finish and something to brown/blue the barrel, butt plate, trigger guard etc.
These kits are worthwhile for those without more tools or time.
Those of us who build rifles can finish one of these in less than a weeks worth of evenings.
Folks who are new to this might take 3-4 weeks worth of evenings to finish it.
Then there are the
Other Kind of "KIT" (which your question was dealing with).
These are sold by Track of the Wolf, Pecatonica River, Muzzleloading Builders Supply, Jim Chambers, Tennessee Valley Muzzleloaders and a host of others.
The quality of the parts is usually excellent, and the cost of the "kit" is high to Very High.
Names like Siler, L&R, Getz, Colerain, Rice, Davis, Chambers, etc are often heard. These parts are some of the very best in the world and they are all made in the United States.
Stock woods are available in Cherry, Walnut, Curly Maple along with some more exotic woods for those who can afford them.
I use the term KIT loosely here.
These are a collection of parts. Most of the parts are unfinished. Some of the parts are still very rough sand castings.
The locks and set triggers are "almost finished" requireing only blueing/browning but the barrel often doesn't have it's breech plug installed, no dovetails for the sights and has a fairly rough finish on the outside.
The stock wood is rough machined into a close to final shape, but there is wood left to remove everywhere. Often the stock has over 2 inches of extra wood to remove when fitting the butt plate.
You will need to know about filing, drilling, tapping, final inletting for the lock, trigger and butt plate.
Even those places who "pre cut" the mortice for the lock etc leave a little wood which requires final fitting to the part which goes there.
The hard part like cutting the barrel channel and the ramrod hole is done but even this will require hand fitting to install the barrel.
The finished gun may take over 150 hours of work.
Some simple, uncarved, unadorned rifles may take a little less. Other rifles with carving and inlays may take a lot more.
I don't want to frighten off anyone who wants to build their own "Custom" rifle (for that is what it will be), but I don't want someone to spend $500+ only to find that this project is too much for them.
We have a Forum here called Builders Bench. When I asked Claude to establish this Forum it was aimed towards the beginner who has a lot of questions. It still is.
Whether you are building a Factory Kit or a Custom "kit" you will find a lot of help there.
There are some of the finest builders in the country who stop by to share their knowledge with anyone who asks a question.
If you decide to order one of the custom kits, remember, most of them offer special services like installing the breech plug in the barrel, installing the underlugs, cutting the dovetails for the sights, cutting the barrel channel for swamped barrels.
Some places will even supply you the rifle "in the white" which means it is fully assmebled like the factory kits and it only needs to have the wood and metal parts "finished".
These of course cost more. Sometimes a LOT more than the $500 box of parts but for some, it is a good way to go.
As I said, the Custom box of parts will make a truly special High Quality gun if you do your part.
Your part is to provide the initial money and more importantly, to plan on providing a LOT of TIME.
Hurrying one of these will turn $500 into $100 worth of junk parts.
Taking your time and being careful will turn your $500 into a classic heirloom that you'll treasure for the rest of your life and your decendents will marvel at for centuries.
This unadorned rifle took me about 170 hours to do. Yes, I could have done it faster, but I chose to do it right. ::