Any idea what this bit is?

[gunboat]

Found this the other day in a box of bits from a friends estate -
Any guess's as to it's function?

[6mmintl]

looks like a mag follower

[Rustybore]

That is a mag follower depressor for a M1917.

https://www.libertytreecollectors.com/productcart/pc/viewPrd.asp?idproduct=974&idcategory=80

Rb.

[gunboat]

So it is -- it is marked 1917 so faint I missed it --
thanks