Offhand, I do not recognize the pictured barrel markings.  (Maybe, made from Winchester model 1917 barrel)?

Where is the "Ordnance Bomb"?

From the 1910's to 1930's, it was a common practice for gun-smiths and surplus dealers to put improvised replacement barrels on Krag actions to make sale-able guns.

Can you post a close-up photo of your rear-sight?

Although your receiver is dated 1895, when first assembled by Springfield, it was regarded as a Model 1896 carbine.

Original model 1896 barrel, stock, hand-guard, rear-sight, barrel-band, and carbine saddle-ring & bar are rare and expensive parts.

The valuable part of your Krag is the 'Rough Rider' numbered receiver, (#27635), that was issued to Trooper Edward Arnold, Co. G, 1st US Volunteer Cavalry.

A somewhat unscrupulous person would be sorely tempted to acquire a 'plain Jane' model 1896 carbine and put your receiver on it to enhance collect-ability and value.

This would tempt many, but, totally violates ethics.