-1. As Shrimp said, the guns are of a different calibre, the 7.62 rifles cannot fit as many rounds as 5.56. The suggestion should be made to up the damage and recoil rather than the magazine size as this would both make them accurate and also create more weapon diversity. To show the power difference between the two 5.56 NATO produces ~1,300 ft lb's of energy while 7.62 NATO produces ~2,500 - 2,600 ft lb's of energy which with hotter loads is quite clearly double the power but with double the recoil too.