The 'carbine ring & bar' was no longer in use when the 'long forearm' carbine was adopted.
The carbine was being carried in a scabbard and the ring no longer had a purpose.
When a 'ring & bar' is found on an 1899 'long forearm' carbine stock, someone outside of Springfield has 'done the job' and made a fake.
BTW - I beg to differ, but, there is an "i" in Krag.
![Image](https://kragcollectorsassociation.org/kca/phpBB3/images/yabbfiles/Attachments/Krag_I.jpg)