The RMB-93 is a Russianshotgun. It has a folding metal stock and features a forward-then-backward motion of the entire barrel assembly instead of the standard backward-then-forward motion of the forend only found on most pump-action weapons. Another unusual feature is that it uses a fixed breech face and movable barrel. The only other mass-produced shotgun with this design is the NeoStead 2000 of South Africa. In addition the tubular magazine is located over the barrel instead of under it. The purpose of this is the give the gun a low center of mass and reduce upward recoil. To reload the weapon, the stock must be extended or removed, a disadvantage if it is being used tactically with a folded stock.