3D printed barrel mounted one piece tri-rail and muzzle device adapter for KWA vz61. The tri-rail combo clamps over the front of the upper reciver and allows for the mounting of standard 20mm or picatinny rail accessories such as grips, flashlights, cameras, etc. A #8-32 x .75" bolt and nut are used to clamp down the tri-rail and are included. The muzzle device adapter allows for the installation of any 14x1mm negative muzzle device. The one piece combo gives a more solid base for mounting longer tracer units as the two piece tracer unit has some play with it. All parts are made to order and are tested for fitment so please allow for a 1-2 week lead time. Material is 3D printed PLA polymer. Due to the nature of 3D printing there can be some minor imperfections in the finish witch can be fixed by some light sanding if you so desire. + shipping and PayPal fees