Oh, could he bring your MP-22?The .40 is a S&W M&P 40c (military & police, compact). It's a nice gun.
Repeter can bring it if you want.
Someone out there had a M&P Shield in 9mm. The Shield is a Sub-compact. Thinner. If you can find someone with it, you might shoot it for a comparison.
Repeter can bring any of my weapons, if someone sees one they want to try. (Look on pervious months list)
That includes the NAA mini-22.