PCS s/n prefix makes it the first version of the 4006Shorty40 - there were reportedly 3 production groups of approximately 500 units each totaling 1583 units PCS0001-PCS1583. Each version had unique s/n prefix. Shorty40 Mk2 was SPC prefixI found a picture of my Shorty 40. I picked it up along with the 3914 in the picture as a group buy some years ago. Both were and still are unfired. It's got a silver trigger and Mag release, and blue slide stop, safety and trigger. As mentioned before, PCS SN. I'm not sure what version of the Shorty 40 it is:
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