Well it is like comparing oranges and apples, Negev is an LMG and Sig 716 is a DMR.
Negev weighs 7.95 kg(gun only) and Sig 716 weighs 4.3 kg.
Negev due to its higher weight has way lesser recoil compared to 716.
Another thing is that Negev in most use cases would be fired in laying down position...