I removed a Parker Hale front trigger screw, the one that is triangular and swivels, from my No.4 MkI. I had it on my rifle for ten years or so, but never used it with the sling. I sold it to someone who now says it won't fit his No.4. Was there a difference from one manufacturer to another or from a MkI to a MkI* to a MkII? Using my Brownells screw checker on the original screw, it fits the 1/4 28 threaded hole. I never checked the PH screw, but the buyer says the thread pitch is too fine. I had no problem screwing it into my rifle, and there were no thread damage when I removed it. Any information will be appreciated.
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