MCIWS's design is influenced by both the AR-15 and the FN FNC. The barrel assembly appears to be based on the AK-47. The design would allow soldiers to configure it according to the needs of the missions by changing rifle barrels. The assault rifle is configured to fire in 5.56 NATO, 7.62×39 and in 6.8 Remington SPC. The MCIWS uses a gas operated short stroke piston design.
The rifle would use 30-round plastic-type magazines. It would also be ambidextrous features, such as the charging lever and magazine release.
The MCIWS would include an underbarrel grenade launcher to fire airburst-type grenades. Various sights can be mounted on the picatinny railing on the upper receiver.
It was first seen at the DEFEXPO 2014 exhibition. They are currently undergoing in-house small arms trials with three prototype rifles made for testing at ARDE.
India’s Prototype MCIWS Rifle In Detail - The Firearm Blog