TR50 Velocity Mod

[COB]

The biggest complaint with the TR50 is the lack of velocity adjustment. Out of the box on a fresh 12 gram the gun shoots in the 315 to 320fps range. The guns efficiency is amazing. You can shoot 4 or 5 clips before the FPS drops below 300. There have been several suggestions for fixing this issue, including shaving cylinders or adding a spacer in the valve. I have found another approach, that can be permanent or temporary. First you have to have opened your gun and looked at the construction, in order to grasp the mod. I purchased 2 modded TR50s a while back. One had the barrel cone notched the other had it trimmed flush. The notched cone shot in the 250 to 280 range with a fresh 12 gram, and was good for 12 or more clips before dropping below 200fps. The trimmed flush gun could only fire 2 rounds, before the cylinder would slip backwards. That barrel cone is important in the index rotation of the cylinder. It keeps pressure on the cylinder and moves in and out by the spring pressure from the barrel. So to the mod. You can lower the velocity by notching the portion of the cone that presses against the cylinder face. This will vent just enough gas to lower the fps. Start small or you may vent too much. They temporary/reversible answer it to have some 3D printing mage create replacement printed cones that can be notched in lieu of cutting the original aluminum cone. As for the one that had the flush cone, I managed to glue an o-ring to the surface. Then with some notching and shaving, made the cone vent and index the cylinder properly. That one shoots 250 plus on a fresh 12 gram. This method saves shaving all or some cylinders and then labeling the shaved ones. It also leaves the valve intact. And with the 3D printed cone, it is totally reversible.