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Yes, the capacity is limited only by the magazines themselves and the 17 or 20 round versions will work too. This version includes the larger magazines instead of the 10-round versions: https://www.budsgunshop.com/product_info.php/products_id/139949/heckler+%26+koch+h%26k+vp9+match+optic+ready+9mm+5.51+20+1+4+black+polymer+frame+%26+grip+with+black+steel+slide

Hi Dean and welcome. Yes Sir. The 10rd magazines are the same physical size as the 17rd mags with the 10rd mags just being internally blocked to restrict to 10rds. Cheers and stay safe!

Hi Dean, yes this will accept larger capacity magazines, the 10rd mags are the same physical size, but blocked to hold 10rds for restricted states. You can find the 20rd version here https://www.budsgunshop.com/product_info.php/products_id/139949/heckler+%26+koch+h%26k+vp9+match+optic+ready+9mm+5.51+20+1+4+black+polymer+frame+%26+grip+with+black+steel+slide, Stay safe & have a great day!