BudsGunShop.com - why is this a conversion

Paul, no Sir. This is a wider 9mm Magazine. You will need : https://berettagunstore.com/product/beretta-m9-22-m9a1-22-92_22-magazine-15rds-22lr/

NO, this magazine is for 9mm Baretta M9 and WILL NOT work in .22 conversion Baretta M9. Te .22 magazines are available HERE ( midwayusa.com/product/1019284055 ) I hope this helps!

No that will not work with your M9-22 the conversion kit is to be able to fire 22lr out of a converted M9 9mm, the 9mm magwell is wider so this magazine is bigger and wider to be able to fit flush inside of the standard M9 grip.
I looked but couldn't find any in stock m9-22 magazines