They won't have high recoil at all though, as the guns would be completely useless then - they're already semi-automatic, which is enough of a disadvantage (obviously disregarding RF macros) when compared to other guns. Add high recoil, and they become useless. Heck, just look at one of the marksman rifles in BO2, the FAL, and how it has virtually zero recoil when in semi-automatic mode.