In this video, they explain a bit about the HISAR missile system.
HISAR-A/O both employ dual-pulse rockets, since alot of missiles attain their maxium range by gliding on to their target when propulsion system is out of fuel.
It's very likely that that the first engine on HISAR family of missiles is just used as a 'Booster rocket', propelling missile out to 15-25km allowing the missile to glide intelligently to increase range, and then for terminal guidance missile fires up it's secondary rocket.
Cirit uses a high-performance short-burn rocket engine. Rocket engine burns up <4km in to it's flight, so for the remainder of it's flight out to 8km 'max range' it is done with only the momentum it gained in those few seconds under propulsion.
The Roketsan engineer also states that such a dual-pulsed rocket presents an enhanced capability to engage sophiscated targets, since the velocity of the missile is variable it would be difficult to predict velocity/time before impact, so aircrafts manuevering to counter HISAR would find it a little more difficult