We've got to remember that there were two modern Hawken shops. The original Hawken Shop in St. Louis spent a great amount of time to produce molds andthe muskets parts and locks that were like the original guns that Art Ressel used to base his kits and assembled rifles on. I've seen and handled some of the rifles built from the correctly reproduced parts. Those are very nice rifles and are hard to tell from original rifles. I've handled Bob Browner's rifles. Excellent versions of the original rifles. Eventually he had to sell the shop, molds and stamps that were based on the original. As fabricators went out of business and the molds for specific parts and the lock builders retired. As Tenngun states, the kit parts while still pretty good from the Hawken Shop are more on the order of average parts. The present Hawken Shop guns do pass the 10 foot test. But, if one went to the Hawken Classic and looked at the original Hawken guns on display, one would observe that no two of them are exactly alike. Sure, they have the same architecture, stampings and you can tell that they are original Hawken rifles, but the parts won't interchange as they rifles are built to meet the pattern as demanded by Jake and Sam and later Sam and still later, John Gemmer.
The rifles (and shotguns) produced in Jake and Sam's shop were built for the market at the time. There were the plains rifles, the post civil war light rifles, the small caliber rifles that were the Hawken brother's version of Ohio rifles. There were some brass mounted guns and silver mounted guns.
Anyway, to get back to the topic with respect to options on the land pattern muskets. These were built to pattern, not to dimension. If they passed the 10 foot test and looked like the intended pattern, they were considered serviceable. That's where we are with respect to the present offerings of the British Land Pattern muskets. We are too used to the present manufacturing capability of interchangeable parts. We just can't find it acceptable when the muskets presently built to pattern have differences from the pattern we have in our minds. There are flaws to be sure in my Long Land Pattern King's Musket from Loyalist Arms. I made my decision because it was closer to the other muskets being used in my reenacting unit's time period. I'm going to have to stick to that decision.