Since I have stepped into 357 sig caliber pistols I'ver broken down and ordered a rifle in the same caliber. Seems all these rifles take Glock Magazines .... is there any difference (other than capacity) in Glock magazines in 357 sig? Also, like with Sig magazines are they compatible with 40 caliber and interchangeable?

I can answer the first one. There is no difference other than length for the varying sizes of handguns and number of rounds. Having at least one 9-round from the G33 can't hurt; it would be handier for shooting off a bench.

Capacity is the same as 40 S&W mags. G22 mags and G31 mags are identical. At one point in time .357 Sig mags used a different follower. Not sure if that’s the case anymore.

After Gen 3 they have the reversible mag catch. I’m not sure what type of rifle you are using but I doubt it will matter for you.

That’s the allure to Glock mags. They all work from Generation to Generation.

as of last year that I know, the .40 #10 and 357 #4 followers look identical.

Thanks guys...

What I've ordered is a Aero survival Rifle from TNW Firearms...