What's This,,a bushing wrench?? but for what...Or?

[2152hq]

I found this in a small envelope in some misc gun parts.
Looks like a bbl bushing wrench but I don't know for what.
I thought maybe a M52 but it's not anything like the single lug spanner I remember.

Two pieces.
The hex piece is 5/8 across flats. Fits in the spanner perfectly.
The hex piece has two small lugs on one side,
The 'pilot' or center is non moveable and measures .345 on my MM approved dial caliper.

Two attached allan wrenches rivited to the wrench but swivel outward for use.
A somewhat crude screwdriver tip forged on one end of the wrench and a simple almost round approx 1/8d tip on the other.

Maybe it isn't even a gun part,,I don't know.

 

[lihpster]

Barrel nut wrench for swapping barrels on a Dan Wesson revolver.

 

[2152hq]

Thank You very much.
Mystery solved

Another item that's good for somethin' even if I never use it.

 

[BLACKHAWKNJ]

It's for the original DW M-12 that had the serrated outside barrel nut.

 

[2152hq]

I faintly remember those now. I was never interested in the DW guns much at all. But I do recall that serrated barrel nut at the muzzle.
Thanks.