Thank you for contacting Mearto with your appraisal inquiry.
The presented object appears to be a Civil War US Harpers Ferry rifle dated into the 1850s. Sadly the exact year is not clearly readable.
This piece is in medium condition and there is no serious damage visible in the images provided.
A fair market estimation would be between 400 to 800 USD.
This estimate is based on actual recent past recorded auction sales of comparable items. Retail "asking prices" can be higher and may vary.
With kind regards,