Nylon holdall's FTW!
well, the thing is if you walk around with a bag that's 4 feet long, people will figure it out what you've got in there sooner or later.
although i must admit in a higher power level game to stuffing this bag with an AKMS, 4 75 round drums of API, and a bunch of white phosphorous grenades... but that's not exactly a gutter loadout.