Beware of scammers.

What little I know of the 7mm Mauser chambering, is that headspace is “generous”.
I have no knowledge of the RB handguns.
If possible, I suggest you acquire a copy of Norm Fladermans’ “Guide to Antique American Firearms” . . . and see particularly description #9A-397 (Navy) and #9A-399 (Army).

I ...

Daniel . . .
I’m not at all sure what caliber (or frame size) you have in your 1910 RB.
Dunno’ if the smaller caliber/frame size have the locking action, but I do know the big, #1 frame does have BOTH normal (early) and locking (later) actions.

Springfield made at least two runs of RBs . . .
The ...

TommyJoe wrote: Mon Jul 06, 2026 5:41 am
A clear close-up photo of the stamp would really help. It's hard to identify the initials without seeing them.

As I posted above, I have identified the final inspector as Orville Wood Ainsworth.

I believe this is a term coined by Norm Flayderman (maybe/probably others) and refers to a safety device incorporated in the later RBs.
Somewhere, I read some foreign users of this action FAILED to maintain these rifles adequately . . . .allowing the fire-pins to “freeze” in the forward position ...

I have two RBs . . .
A Springfield-made, 1870 U.S. Navy rifle and a NY State militia model.
The militia model has the “locking action” while the Navy model does not.
Did the 1871 Army model (Springfield) have the “locking action”?
When did the “locking action” come into being?
Inquiring minds, etc ...

Though this is an old thread, I believe I can “shed some light” here . . .
The machining of the block and hammer is such that when the hammer goes completely into “battery”, all clearance twixt the hammer and block is eliminated.
Until that happens, some clearance is normal.
Remington engineers knew ...

Thank you, Daniel . .
I have now determined the initials to be “OWA” . . . .Orville W Ainsworth.
This NMA was mfg. in September, 1864 . . . .or thereabouts.

There are three inspector initials on the left grip of a NMA.
I cannot make them out.
I’ve seen two initials on other grips, but not three.
Who used this three-letter stamping?
Thanks-a-bunch!

I see THREE letters (script . . .and indistinct) on the left grip.
Who is this guy?
Thanks-a-bunch!