Arrived this morning. Looks very good. Needs a through cleaning but rifling and everything looks very good. Anyone have a clue what the square block on the bottom rib is?


[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]

[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]