FB-6A
FN-6A did not enter mass production and served only in very limited number in Chinese forces, mainly as trial purpose. In the subsequent Zhuhai Airshows followed its original debut, FN-6A is replaced by its successor FB-6A, which did see greater numbers in service with Chinese forces. The general designer of FB-6A system is Mr. Wei Zhigang (卫志刚), rumored also to be the general designer of FN-6A, the predecessor of FB-6A. The main difference between FN-6A and its successor FB-6A is that the SAM system is broken down into two portions in the latter, as opposed to a single unit in the former: FB-6A SAM system is consisted of two vehicles, one carrying the engagement radar, while the other carrying the missile. The search/engagement radar of FB-6A is planar array, and can be folded down in transit, but the developer has not revealed whether the radar itself is a phased array or not. However, the developer did claim that both the mechanically scanned planar array and the electronically scanned passive phased array are both available upon customer's request, but it's not clear which one is in service with Chinese forces.
The missile launching platform of FB-6A differs from its predecessor in that both the 12.7 mm heavy machine (HMG) for self-protection and the electro-optical fire control sight on that of FN-6A are deleted, but a backup operator console is incorporated with bulletproof glass added between the launchers, though the FB-6A system can be operated with the vehicle. Although the 12.7 mm HMG is no longer the standard equipment of FB-6A system, it can be added as an option, and is interchangeable with other machine guns. The total numbers of missiles carried by the launching vehicle of FB-6A remain the same as FN-6A, still totaling eight.
Read more about this topic: FN-6