General Jagath Jayasuriya Maj Gen Milinda Peiris The Mechanized Infantry Regiment (MIR) is a mechanized infantry regiment of the Sri Lanka Army.

Establish in 2007 by Lt. Gen. Sarath Fonseka its battalions are equipped with Type 63 and WZ551 armoured personnel carriers make up the Mechanized Infantry Brigade.

It is the youngest Infantry regiment of the Army.

The Mechanized Infantry Regiment was raised on the battlefield on 14 February at the divisional headquarters of the 53 Division at Kodikamam, Jaffna in order for the army to have specialized mechanized infantry units to deploy in battle, instead of using regular infantry along with armoured personnel carriers as it had done before.

Three battalions where formed with officers and men from 3rd Light Infantry Battalion, 10th Sri Lanka Sinha Regiment, the 4th Gajaba Battalion and 5th & 6th Reconnaissance Regiments of the Sri Lanka Armoured Corps.