I cannot pick up JAW in Crysis 2 (PS3)-Message says "Unable to Carry"?

In Crysis 2, Dead Man Walking level, I cannot pick up the JAW to blow open the door. I am playing on the PS3 console. Keeps saying "Unable to carry more" but I can swap out other weapons. I tried restarting at the last checkpoint & same thing happened. I tried emptying ammo on both weapons I am carrying & it still doesn't fix this issue.