Thoger,

There is a lug on the frame that keep the cylinder from sliding out of the yoke when you open the weapon. The Model 14 has always had a cylinder that is not recessed. because of that, the lug is longer than it is on the Model 19 which has a cylinder that is recessed. If you use a 19 frame the cylinder will slide on the yoke barrel. The revolver will then be difficult to close unless you are careful.

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S&WCA 1729