Hi Norman and welcome. Yes, the 10rd magazine is the same physical size as the higher capacity magazines which are just internally blocked for sale in capacity restricted States. The pistol will accept higher capacity magazines no issue : budsgunshop.com/product_info.php/products_id/54266/mec-gar+mgp22618+sig+p226+magazine+18rd+9mm+anti-friction ---------------------------------------- budsgunshop.com/product_info.php/products_id/123101/mec-gar+mgp22620dps+sig+sauer+9mm+luger+sig+sauer+p226+20rd+black+anti-friction+coating+extended

Hi Norman, yes sir, this will accept higher capacity magazines. This 10rd model is sold for those who live in restricted states, but will take other magazines.
Stay safe & have a great day!