He was the oldest of three sons born to Qasim, along with his brothers Haqnazar Khan and Abu'l Khair Sultan.
The Kazakh Khanate was greatly reduced for a brief period, but Mamash was able to recapture the western lands as far as modern-day Atyrau from the Nogai Horde.
Nevertheless, he still faced competition for his territory from the Russians up north, where the Tsars of Russia considered the lands as theirs to take.
In 1523, Mamash died in an internal conflict due to suffocation and injuries caused by weapons.
[4] Khanzada Tahir, the son of Adik Sultan and nephew of Kasym Khan, ascended the throne after him.