My attribution is based on my familiarity with several other Laudenslager rifles. This rifle appears to have features seen on rifles signed or attributed to William Laudenslager, Samuel Laudenslager (William's older brother), John Laudenslager (William's cousin), J. G. Ulrich (another cousin), and S. H. St. Clair (an uncle that they all may have apprenticed under). However, I can't 100% rule out William Long as a possible maker. I've not seen enough signed rifles made by William Long to know for sure. I have to agree with Spotz regarding the flintlock. It was likely originally made a caplock percussion gun and converted to flintlock. It's impossible to tell for sure with photos alone. There are plenty of late single-bolt original flintlock guns around. Thanks again for posting the photos.
Mark Loudenslager