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See U.S. Patent No. #,045,555 granted to E.M. Stoner for the details of the trigger mechanism and how it functions. Viewing the "Anatomy" video on Bushmaster's Website may also be helpful to your understanding.
You question is somewhat vague so I'm guessing you wish to polish the bottom side of notch near your number 5 (and the interfacing trigger surface). Best of luck. Not legal advice, MHO, YMMV, etc. |
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