Just received this bag. The first thought I had was that it was a little small. The zipper compartment on the end unzips to make it longer. It will fit a standard gun not much longer than a M4 with 363mm inner barrel. Most DMR's will not fit. Also if you have an Eotech replica it may fit nicely. I have an Aimpoint CompM3 and an Acog replica, that will almost not let the bag zip up if it is mounted to the rifle. It's got a ton of pockets that fit batteries, magazines, optics, etc. It also has some velcro to attach some swag to. It's heavy duty nylon and zippers. It should last a long time!
Unzips to fit a gun inside
Tons of large pockets
Velcro to add patches
Won't fit two rifles with attachments mounted
Hard to fit one rifle in with optics mounted, but will fit.