13 0 1Actions Report Solution You can get this in Chapter 3. You can pick up a grenade in the first encounter of the chapter, and then do this in the second encounter. A "long-gun" just means anything in your right d-pad slot. So anything other than a handgun should work.Showing only comment. Thank you. It was a helpful video!Posted by duke63031 on 22 Feb 18 at 19:02