Boyer rifle

The two barrels were rotated into firing position by releasing a hinged catch in front of the trigger guard.

There was a single lock that was used to fire using whichever barrel was currently in position.

Although this gun was also a Boyer rifle, the gunsmith was not the same as the earlier 1800 variant.

The 1800 variant was named after its creator Daniel Boyer of Orwigsburg, Pennsylvania.

The 1840 variant was named after its creator David Boyer.