The ADMC uses 9M317 anti-aircraft-guided missiles (AAGMs) manufactured by Dolgoprudnenskoe Scientific Production Plant (DNPP). Each missile has a length of 5.5m, a wing span of 860mm and a weight of 710kg, and can carry up to 70kg high-explosive fragmentation warhead with radar proximity and contact fusing system. The missile is propelled by solid fuel propulsion system.
http://www.army-technology.com/projects/buk-m2e-air-defence-missile-system/
CR is a type of fragmentation warhead.
Little is actually known about the specific Russian warheads, and there are almost certainly lots of variations.