Umarex Zelos Hammer Weight

Custom hammer weight machined for the Zelos. The brass/tungsten hammer weight is needed to open the valve when using higher reg pressure or wanting longer valve dwell time. Increase in fps will vary depending on the setup. I’ve seen up to 15fps with the brass and up to 30fps increase with the tungsten on my personal setup. Other mods like porting and larger valve will assist as well

You will use your existing factory hammer spring and replace the spring guide (hammer spring adjuster) with the brass one that is included

Both hammers have 6mm preload