Sooo, I have several Glocks, S&W's, and currently sport a Sig Sauer P365 as my EDC. It's a 9mm, double stack, but is almost the same exact size as the Glock 42...it's a bit thicker, (double stack), but other than that, it even fits in the G-42 holster. Not sure where you live, but here in South Dakota, we have "Constitutional Carry", our state issued ID is our CCW.