When were unfluted firing pins modified / replaced ?

Edward Tinker · 04-03-2021, 11:24 PM

I find that most 'early' Simson's are non-fluted, but the vast majority seem fluted to me. My gut feeling (but I have never kept track) is that shortly after production (1925/1926), so mid 20's the requirement for fluted came into existence.

I also seem to remember a directive, that maybe discussed this.

Ed

Vlim · 04-04-2021, 07:42 AM

Also note that the lubricant of choice in those days was grease and not oil.

Grease has the tendency to clog up in certain areas. Flutes help to prevent the firing pin from sticking on a too heavily greased breech block cavity.

04-03-2021, 11:24 PM	#1
Edward Tinker Super Moderator Eternal Lifer LugerForum Patron Join Date: Jun 2002 Location: North of Spokane, WA Posts: 15,974 Thanks: 2,072 Thanked 4,609 Times in 2,123 Posts	I find that most 'early' Simson's are non-fluted, but the vast majority seem fluted to me. My gut feeling (but I have never kept track) is that shortly after production (1925/1926), so mid 20's the requirement for fluted came into existence. I also seem to remember a directive, that maybe discussed this. Ed

04-04-2021, 07:42 AM	#2
Vlim Moderator Lifetime LugerForum Patron Join Date: Oct 2002 Location: Europe Posts: 5,053 Thanks: 1,036 Thanked 3,991 Times in 1,205 Posts	Also note that the lubricant of choice in those days was grease and not oil. Grease has the tendency to clog up in certain areas. Flutes help to prevent the firing pin from sticking on a too heavily greased breech block cavity.