my chromed dpms wasnt hard to modify
just had to take it down from about .4" to .38" on the rear and square it a bit so that the paddle would not strike the curved edges first. I like to use a thicker paddle and it is a little difficult to close. Another .01 would make that a lot easier, and I dont really think that it would affect reliability, but I do not have any way to add material back if I didnt like it.
Really only takes 3 or 4 minutes with a carbide bit on a dremel. So that makes me think that it is a good option. A real sp1 is usually 20 years old and never has easy to clean surfaces.
Dan
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