I've got several. Although I've never paid $40 for one. I change the followers out to the .357 SIG version. Then they either get used as backup/car mags for my IDPA gun (Glock 35 with .357 SIG barrel) or in my DI AR-15 pistol that uses Glock mags. Also .357 SIG. That little gun has a 9 inch barrel which is just enough to max out the potential of .357 SIG. It's a actual DI gun rather than recoil operated like most AR pistol carbines. Very nice and those 22 round mags are perfect for it.
Gregg
Gregg