iw80a2 was the gun of choice for seals. i used the m4sd if i felt like not sniping. otherwise i would rack up so many kills on foxhunt or crossroads or fishhook sniping with my m87elr or m82a1a (which is the barrett 50 cal btw) on the terrorist side and then run around with the mk23sd and kick the shit out of people trying to kill me with auto guns