It is a model 1899 carbine stock. The saddle ring & bar were discontinued with the model 1899 carbine.

The U.S. Cavalry had ceased to used the shoulder-belt with its 'roller carbine snap-hook'. Carbines were simply carried in the saddle-scabbard.

(IMHO - It was realized the 'Carbine Ring' had become a useless noisemaker and expense, that also weakened the stock).

I am continuing to use the same hand-guard.
It is Italian walnut and is lighter in color than the American black walnut 'cut-down' rifle stock, that I was using.

It is a good match with the 'new' carbine stock.

(BTW - In looking at SAW photographs of mounted cavalrymen, it appears the use of the 'crupper' was eliminated in saddle tack. I'm sure this made the horses and troopers happy).

---