What is the features of MiG- 21 Bison?

If you're thinking of the Mig-21 Fishbed, then it's distinguishing visual features would probably be it's simple shape and the central shock cone of the nose air inlet. read more

The Mig-21 Bison is an upgraded Mig-21. It has a larger radar that can guide radar guided missiles, giving the simple but lethal fighter some BVR combat capabilities and updated avionics and cockpits. List of Mikoyan-Gurevich MiG-21 variants - Wikipedia. read more

MiG-21 Bison is the other one variant in IAF.After the retirement of Mig-21s from IAF,the remaining remaining 150 aircraft,Including Upgraded miG-21 Bisons are scheduled to be phased out by 2022 or 2025 and replaced by HAL Tejas. read more