This is the second such bag I've ordered from Grizzly. And actually I use neither bag specifically for carrying nail guns. The first is devoted to my WORX, 2-position, switchdriver drill and all its components--extra drill bits, bit-gauge, extra battery, and charger. The second is devoted to my heavy duty air-driven impact driver (Ingersol 2235) and all it hi-impact socket wrenches which collectively are quite heavy. Both bags serve their respective purposes very well and I'd readily buy another H3401-bag for any similar devoted-duty purpose. I will say the zipper on the second bag does not operate as smoothly as it should despite some lubrication with WD-40 spray.