The 125th Napier's Rifles was an infantry regiment of the British Indian Army. At various points in history it was also known as the 1st Extra Battalion Bombay Native Infantry, the 25th Regiment of Bombay Native Infantry (1826–1889) and the 25th Bombay Rifles. Amalgamated with five other regiments in 1922, it is now the 5th Battalion, Rajputana Rifles. The Battalion celebrated its bicentenary on 17 Feb 2020. The Battalion is now known as 5th Battalion the Rajputana Rifles (Napiers) or 5 RAJ RIF.

The Rajputana Rifles is the oldest rifle regiment of the Indian Army. It was originally a part of the British Indian Army, when six previously existing regiments were amalgamated to form six battalions of the 6th Rajputana Rifles. In 1945, the numeral designation was dropped from the title and in 1947 the regiment was transferred to the newly independent Indian Army. Since independence, the regiment has been involved in a number of conflicts against Pakistan, as well as contributing to the Custodian Force (India) in Korea under the aegis of the United Nations in 1953–54 and to the UN Mission to the Congo in 1962. As a rifle regiment, it uses a bugle horn as its insignia, the same as the British Light Division, but unlike its British counterparts, the Rajputana Rifles march at the same march pace used in the Indian Army as a whole.