New 220A receiver

[CDSUSMC]

Just came in today, a 220A receiver with a marking of 4G.  The other receiver I own is an 4E  and I was informed the it was made in 1953. I would think that they are very close in manufacturer time wise. But looking at the two there is some different parts used, such as the trigger and the safety button. The firing pin also looks to have different details to it. I have included photos. Hope to mate it up to a good looking 12 gauge barrel I have coming my way thanks to a new friend I made here.

[Garnett]

It looks good!  "G" is 1955.  One has a steel safety button and the other is an alloy.  My gunsmith/machinist as advised me that there are differences internally with the same model Suffix's and a single part may not interchange.  Thanks for the pictures.  Please keep sharing your project with us.