That was originally one of Ron Long's Hawken flintlocks as you guessed,
Trapper1993.
Here is an ad from
Muzzle Blasts a little after Long introduced the lock.
Here are some pictures of one of these locks in its original unaltered state.
I'm not sure why there is a hump forward of the hammer with a screw hole drilled into it,
Note the "hump forward of the hammer with a screw hole drilled into it" was part of the original designed of the flintlock. The rounded "hump" follows the shape of the frizzen bridle which was cut off as part of the conversion to percussion.
Wasn't Long bought out by Davis and then Log Cabin Shop
That is correct, but the story is a little more convoluted than that. Ron Long sold his lock, trigger, and breech plug business to Tim Houseweart at the end of 1981 as documented in this item from the Sept-Oct 1985 issue of
Muzzleloader magazine.
At some point, Houseweart lost interest in the lock making business and decided to sell it. The first buyer to make an offer was Tom Faux of Brighton, CO. Faux apparently only wanted the Hawken flintlock, so he purchased the molds and jigs from Houseweart for just that lock and proceded to make and sell Ron Long's flintlock and possibly some other locks he developed.
In the meantime, R. E. Davis approached Houseweart about buying the whole business, and they were able to reach agreement on price and conclude the sale. It is my understanding, though I have no first hand knowledge or proof, that Houseweart didn't disclose that the flintlock molds and jigs were not part of the deal. In any event, Davis asked Ron Long to make another set of molds for the flintlock.
This second set of flintlock molds are similar for the external parts to the first set that Tom Faux had, but Ron Long made some changes in the internal parts. The differences are great enough that some or all of the internal parts between the first and second set of molds are not interchangeable.
Tom Faux eventually decided to quit the lock making business and sold the Ron Long flint Hawken molds and jigs, along with some other items, to The Hawken Shop of Oak Harbor, WA who are currently producing the lock.
As
cannonball1 stated, Log Cabin Shop purchased the RE Davis Company and rights to all their products.
Trapper1993, if you ever need to replace any of the internal parts on your lock, you should contact The Hawken Shop for replacements rather than the Log Cabin Shop to ensure they fit properly.