Facebook might hate freedom, but it's still going strong here.
Pronounce it how you like as it is an acronym for some chinese gibberish. I also suggest using a phonetic alphabet to ask questions about pronouncing something- like in the dictionary between the () in funny letters.
I actually have a couple CYMA rifles (CM.050 and M187d) and always pronounce it like "see-ma", and people seem to understand.
ALRIGHT GIRLS YOU\'RE BOTH PRETTYNOW SHUT THE **** UP