A Hammer Weight to add to your FX Impact, to help open the valve at higher regulator pressures. This Hammer Weight is slightly larger than the Hammer Weight now included with the FX Impact Power Plenum. Can add up to about 60 FPS, based on previous regulator settings and caliber. Replaces the plastic Spring Guide on Pre-Power Plenum models.
Note: You might will have to close your valve adjuster completely when re-attaching an air bottle to ensure the valve pin properly seats, due to the extended length of the hammer assembly.
Hammer Weight weighs about 5.9 grams. Compare to FX Power Plenum hammerweight that weighs 6 grams, but is longer, providing less hammerspring adjustment.
Not recommended if you already have the FX Impact Power Plenum.