The GRENDEL is the 2nd assault rifle available for unlock right before the scarab. At first i hated this gun, it seemed garbage and felt as if it was so freakin SLOW!!! But after getting bored, i decided to be much more tactical than usual. Nope i didnt camp, but i tried the Grendel w/ red dot and extended mags. I rushed but made sure to keep distance and to my amazement the Grendel holds TRUE stopping power. If you shot a guy with the first burst and followed it up it would almost be an instant kill. I found this gun to be superior in mid-long range. I seriously was just 2 bursting people and 3 burst when they had armor already on. Another thing in close range combat hip fire accuracy on that gun is amazing still on killing in 2 burst.
Im just surprised i overlooked this gun. BTW The Retriever++ perk seemed to work well with it because you wouldn't have to worry bout picking dog tags up while keeping distance to atleast avoid close quarter combat. I went 25-1 in instant action(FREE FOR ALL).