The grenade launcher is just so much better than the other specialized weapons. I tried it out and it makes some yellow bar/boss fights almost trivial. I just love the perks on the sharpshooter tree, with the headshot, stability and reload buff though. I tried an LMG for a while to make full use of that from the Demolitionist tree, but I just click with the AR so much better. Even with the TAC50 fix coming tomorrow, I'm not sure a clunky, slow firing sniper is the weapon for me. Also, not much of a fan of the flashbang grenade versus the Incendiary or fragmentation grenades.