Military Barrel Measurements

SP45

I have had these around for quite a while. They came from the estate of a retired Army Gunsmith. They are unchambered 22 LR. Do you know what they fit.

http://imgur.com/a/MZpMB

Photo with dimensions added

rufe-snow

It would help if you gave the overall length. Also diameter of threaded shank. And threads per inch.

perry shooter

i WOULD TAKE A GUESS AND SAY THE TRAINING RIFLE THAT WAS MADE FOR THE
03 SPRINGFIELD. I THINK CALLED THE M22

amparts

Not the Springfield 22 trainer, it's barrel has same thread as the 30-06 barrel.

Tailgunner1954

With threads on both ends (and in 3 places on the one), I'd have to guess some type of training MG.