Many wiki's are perfectly usable (so long as they are properly documented), I am a great fan.
Neither the wiki on the Durjoy class, nor the pages on the individual craft mention Type 730
Not any less reliable than e.g.
Bangladesh Navy Large Patrol Vessel BNS Durjoy ~ Bangladesh Defence
CIWS is a term that has many confused. In a broad sense, it is any weapon system for close in (air) defence. This can be missile or gun or combination. In the narrow sense, it specifically is a last ditch (and hence typically very short range) anti-antiship missile system. As such, out of necessity, its operation is fully automated from detection to tracking to engagement and kill e.g. Goalkeeper, Phalanx, Kashtan, Barak, RAM. According to the last definition, it is questionable is the AK630 is eligible for this title.
This has the Type 730 reference
List of ships of the Bangladesh Navy | Project Gutenberg Self-Publishing - eBooks | Read eBooks online
and
List of ships of the Bangladesh Navy - Wikipedia, the free encyclopedia
AK630 does not weigh 9 tons.
Russia / USSR 30 mm/54 (1.2") AK-630
For the control systems, they count2 gun mounts plus the weight of an MR-123 as well as a control console and an optical ringsight.
MR-123 weight is approx 2400kg
2 AK630 gun mounts with ammo = 3800kg
Ringsight 450kg
That's about 6,25 tons, without a console and other below deck equipment.
BAGIRA MR-123-02/3 Multipurpose Naval Artillery Fire Control System - Concern Morinsis-Agat JSC
MR-123-02ts SHIPBORNE ARTILLERY FIRE CONTROL | Russian Military Analysis
Naval Guns
For the AK306, a large part of the additional weight is the optical sight (see pic in post 51)