This is our TommyBuilt Tactical TMP .45 painted in RAL8K Duracoat. Comes with (2) 25rd mags, (4 piece) aluminum rail kit with hand stop/sling loop. These are built with our US Made TMP polymer UMP semi auto style receivers. It has the correct length ejection port to run all the pistol calibers like the real UMP. The barrel is black nitride finished, threaded in the standard 5/8x24 thread pitch, comes with a Compensator. (NOTE: Painted stock available for SBR if desired).