BUT I'd lean towards blaming Bubba, OR a bad day at the factory, OR some combo of both. Next to the Buttler, Bubba always did it.
The cylinder looks chamfered, NOT by the factory. The side plate seams look a little off, for factory work. MIGHT the barrel have been replaced??? The screw on the rear sight aint exactly pristine looking. IF THAT INTERESTED, & no box, a letter would say what barrel length it originally came with.