Here's my Markham Chicago model, 1887-1910. Markham has been credited with being the first commercially successful BB gun. .180 large BB/darts can be used, maple wood with rosewood stain and brass barrel liner. The upper metal rod is used to hold the barrel in place and is actually held in place by a small "U" nail. The metal rod underneath the butt stock is used to clear the barrel if needed. The barrel swivels and is attached to main frame by and actual door hinge and there is no trigger guard! The rear sight is a "V" notch that is a whopping .135'' at its highest point and the front sight is quite literally a bead .057" The rifle is about 32'' long and weighs about 1 1/2lbs
if there's a head wind it might come back and hit you in the head! I really don't know I can't find any fps on it and on this one I'd need to do something to the piston head seal wise which looks like a brass and I don't have the large BB size either.
