Hammer tuning kit compatible with:
Artemis / Snowpeak AP900 / AP1000 / Mercury
Air Venturi Alpha
This kit allows you to reduce and fine tune the hammer pre-load by stacking the included shims, giving you precise control over hammer strike energy. By reducing excess hammer pre-load, you can:
Improve air efficiency
Reduce noise
Reduce cocking effort
Improve trigger feel
Minimize mechanical stress
Also greatly increase power up to 100fps over the stock spring.
From testing the biggest shim with the kit spring is enough to greatly increase power over the stock spring and shot count.
The kit includes the shims and a new hammer spring. The hammer strike force will decrease when using the kit, which will improve efficiency and with the large shim actually increase velocity over the original spring. Prior airgun tuning experience is strongly recommended. Do not add shims when using the factory hammer spring: this will result in excessive hammer pre-load and may cause damage to the valve. The stock spring is too heavy and is actually decreasing velocity because it is opening and closing the valve too quickly but then is wasting air by bouncing the valve open several times after which does not help velocity and uses up your air.
The modification is fully reversible.
Use the smaller shims for less power and even gr
