For my own convenience, I worked up the specs from the front of the RSP and the bottom edge, based on the drawing specs. This is easy to do before the plate is assembled, but if the gun is built just keep this in mind: my spec is from the front edge of the RSP, not including the flange of the trunnion in front of it. Here's what I use: 3.599" from front RSP edge, and 1.516" from the bottom edge. This one is not so critical, being off a few thou is not going to effect function of the latch.
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