When it comes to SIG magazines there is nothing "standard" anymore
They are using what seems like an every increasing number of variations and sources for magazines. This has been happening for over a year now... started back when there was a big shortage of magazines and SIG couldn't get enough to supply with their guns and temporarily started shipping only 1 magazine per gun to try to solve the issue.
Since then they have found new sources of supply and we have seen a wider range of designs, finishes, makes, etc. coming through with the guns.
I've lost count now at how many different magazine versions they are shipping and frankly there is no consistency. We are seeing shipments where the same model guns can have two or even three different magazine types (made by different suppliers or with different finish or design).
Mix into that the fact that many of the models we import are "E" prefix guns (meaning they are hi-cap magazines that we have to have "pinned/welded" to ten rounds for import to Canada)... that means even more magazine variations.
There is nothing "standard" about this anymore.
Mark