The 40 mm Under Barrel Grenade Launcher,[a] is a single shot grenade launcher developed by ARDE and Ordnance Factory Tiruchirappalli[1] for use with the INSAS and AK-47 rifles used by the Indian Army.

[4] It was reported by the Indian Ministry of Defence in 2011 that paramilitary forces ordered around 100 UBGLs.

[5] In 2020, production of 40mm rounds began in Ammunition Factory Khadki under Atmanirbhar Bharat.

[2] It has a three-point attachment system to be able to mount the UBGL to the rifles with a built-in safety to prevent accidental discharge.

The ammunition fired by the UBGL is similar to the Milkor MGL used by the Indian Army, allowing for standardisation.