TMP .45 pistol, these are built with our US Made TMP polymer UMP semi auto style receivers, These have the correct length ejection port to run all the pistol calibers like the real UMP. The barrel is black nitrided finished, threaded in the standard 5/8x24 thread pitch, comes with a COMPENSATER. These come with , 1 US made UMP 45, 25 round Magazine, (3) piece aluminum rail kit ( includes 2 front, 1 top), Hand stop with sling loops and our backpack with patches. The caliber can easily be changed on this platform by swapping out the barrel, bolt carrier and mag. additional mags and other accessories can be found at Hkparts.net. we are only offering the braces separetely at this time, The SB Tactical braces fit as well as our TMP brace.