Yes, I realize this. I've done the reading.
If I had a gun with more definitive indicators that the mag was preban I would probably do it but as is it seems to be a tad bit tricky to tell. I was actually going to call sig and see if they *ever* produced a zipperback mag post ban (and thanks for all the info you have provided on that front), and get a hold of some of those if they did not, but honestly it just seems like more trouble than it's worth.
You're going to go all doubting thomas on a Sig mag?
If anything, those are easy to feel comfortable about. Basically anything that's phosphated with witness holes on the back of it, that doesn't have an LE marking on the front, is more than likely preban. This includes zipper mags (really old) and zig zag backed mags. The oldest mags (way, way before the ban) also don't have a caliber (some don't even have the model, they just say SigSauer on them) marking, because there was no need for it- at one time all sig double stacks were ONLY 9mm (eg, the P226 and the P228 were the first two guns in 9mm, so the mags for these guns had no caliber marking. ) If you are really paranoid just get a P228 zipper back mag.
Note to readers: This doesn't mean a caliber or model marked mag is a bad thing, it just means that the mag is a lot older if it doesn't have it.
I say all the above as a guy who bought a crapload of known preban sig mags before the ban expired... so I know what many of them look like. (I probably still have over a dozen of them... ) I've also watched the progression of the mags chronologically. There may have been some preban mags with side witness holes, but that's the only thing I'm not sure of. Today all, or nearly all the postbans have side witness holes. I have not seen a single unmarked postban that had rear witness holes in it. They're all on the side. If there are unmarked postbans with rear witness holes in them, they've got to be pretty rare. It would stand to reason that the only mags with rear witness holes are prebans or during bans- (and during bans are all LE marked, right on the front of the mag in very small print). Hell, when the ban expired, even
in the free states it was often difficult to get unmarked postbans, because all the big vendors were flooding the market with craploads of cheap LE marked mags.
I managed to survive multiple trips to some of the shadiest ghettos in Detroit without a gun, if I need more than 10 rounds (or 10 rounds plus another mag) then I guess it's my turn to check out.
If you're going to think that way, then why bother carrying a gun at all? If I felt that way, I would just leave my gun at home. I guess I just think carrying a gun that you can (legally) stuff 13-15 rounds into (depending on the follower in the mag) with a 10 round cripplemag is like driving a car around with 4 donut tires on it. It'd be one thing if we were talking about an M&P, or a SigPro, or an XD... some gun where you really don't have a choice. (Although, apparently you can jury-rig a preban Beretta 9mm mag to work in some variant of the XD9, and not compromise its viability in a Beretta, which keeps it all within the law. )
Non carry? Rifles? I fully intend on scouring the earth for preban mags for them. Just talking about the carry piece.
In any SD shooting incident, there's at least a 50% chance they're going to come and clean out your house or apartment, too, so anything you weren't carrying ends up being on the table as well. So if you're gonna sniff the fumes, you might as well apply it to everything you own, or at least, everything you keep within the borders of the state.
-Mike