Not commercial or military, but "Public Security". Definitely not commercial.
As LC pointed out to me not long ago, some of the "factories" had a better fit and finish than others.
I have an /016\ also, and my judging based on all the other "odd factories" I've held, it is the best in terms of fit and finish IMO, besides one if the early short lug /206\'s Ive held which was right on par also.
I have a feeling they wanted the PS guns to be made high quality, thus choosing 016's (or they may be 416', i really need to start a picture thread on that topic), 26's, and whichever the other ones there were (0141's?)