The MTs-255 (Russian: МЦ 255) is a shotgun fed by a 5-round internal revolving cylinder. It is produced by the TsKIB SOO Central Design and Research Bureau of Sporting and Hunting Arms. The Russian-made guns are available in 20, 28, 32 and .410 gauge.
The MTs-255 is unique in that the forearm extends nearly all the way back to the cylinder. The shotgun is reloaded in a manner consistent with that of most modern revolvers, by unlocking the cylinder, and swinging it away from the frame to the left and down.