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8/17/2026 6:26:44 PM EDT
I have an old colt receiver that is large pin.  With a .172 pin guage it fits through the receiver.  I have 2 ejector pins that are .1714 and fit the receiver.  One ejector pin is Rockwell C 41 to 45.  The other ejector pin is Rockwell C 50 to 55 hardened to the core.  Both are nitrided.  They are both made from H-13 tool steel.  Will these work for the oversized colt receiver if the grooves are ground in them for the J-spring and the hammer pin grooves?
8/18/2026 11:54:56 AM EDT
[#1]
Sure, if you are satisfied with the clearance.

I'll bet the stock pins are nowhere near that hard.

Keep your powder dry, and watch your back trail.
8/21/2026 7:49:07 PM EDT
[#2]
H13 is listed as a hot work tool steel, never heard of it & I have used a lot of tool steels.

Any hardened steel in the upper 40's or low 50's "C" scale should work fine.

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