How can anyone tell if a magazine was manufactured prior to 9/14/94? I'm curious because I just purchased a Sig (private sale) that came with some 12-round mags that were represented to me as (and I have no reason to doubt in fact are) pre-ban.
What model is it?
If it's a P226 chambered in .357 or .40, the mags are probably post-94
because that model didn't come out until after the ban.
If it's a P229, it could be a toss up. IMO most of the parkerized Sauer
marked mags (eg, they have the SigSauer circular logo on them) are
preban... And even moreso if they only say ".40" on them, because
later P229 mags say ".40 .357" on them. (This doesn't mean the mags
with both are definitely post, but the ones with only .40 listed are almost
certainly preban). Some mags only say "SigSauer" on the side of
them, those are most likely preban, as well. (I have some really old
P226/9mm mags that have no caliber marking at all).
What makes things more confusing is that MecGar made quite a few
aftermarket (eg non sig branded) mags before the ban, and they still make
the same product now. The designs of some of these products have not
changed since they came out. (The patents on a 17 round 9mm P226
flushfit, for instance, date back to 1993 and 1994. )
Other possibly useful anecdotal evidence:
-It seems almost all the new postbans I've seen for P series guns
are a shiny blued finish. They don't seem to be making them phosphated
much anymore.
-The newer postbans also have a date stamping on the models which use a
plastic floorplate. (yes, it's visible externally). Of course, using that alone
be misleading, especially if the owner rebuilt the magazine... . especially in the
case of a P228 or P229 where a loaded mag landing base-down on the cement
could easily crack or damage the floorplate. (At least I've heard a few accounts
of that happening to some people.. )
-I've -never- seen any preban P229 mags that were sold as mecgar
aftermarkets (eg, non sig branded). This doesn't mean they don't
exist, however.
-WRT preban mecgar flush-fit mags... (eg, the 15 round P228 and
17 round P226 mags) These mags were (and still are) produced in
blued and nickel finishes. Vendors were selling them DURING the ban
albeit at a premium. The problem is now the prebans are virtually
indistinguishable from the brand new stuff. Other than "just knowing"
there seems to be no way to tell! The magazines do have patents
printed on them, but the patents date back to 1993 and 1994.
Take any of this for whatever it is or isn't worth.... I've researched
this a bit, and that's all I've been able to come up with from what I've
seen "in the wild".
-Mike