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AM180 Sear Pins

m60joe@m60joe.com

 

New sear pins to prevent breaking. Instead of the existing spring plunger grooves, which yield a small weak diameter, I make a pins with two "nests".  The spring plunger in the sear rests in one nest or the other.  The plunger slides from one nest to the other by a shallow groove between the nests. The groove helps prevent the plunger from popping out while switching from SEMI to AUTO. The pin material is a heat treated 4140 steel.  

 

 

Broken Pins                                                               New Pins

   

                                                                                    Bottom pin is the old style.

                                                                                    Top two are new style.