[condition1blog]

I noticed the P320's .40 caliber mags lack the vertical ridges present on the 9mm mags. Anyone know why that could be? Was the P320 designed around the .40 caliber?

 

[bearone2]

maybe a way to identify them.

idk

 

[stlmia]

maybe a way to identify them.

idk

Would be my guess. Tactile rather than visual.

Either way, probably not something to draw a big conclusion from.

 

[Malicious Compliance]

I'm guessing it has to do with the diameter of the cartridge. The 40, being bigger, fills the full width of the magazine. The more narrow 9 needs some space taken up, hence the filler ridges.