ZERO 2 / PERFORMANCE SPRING KIT - HEAVY
Suitable for all ZERO 2 models: 
AREX offers different recoil spring strengths to ensure perfect function and slide velocity, even when using reloaded or sporting ammunition, as well as NATO ammunition. 
These springs also improve the function when using silencers or performance compensators.
Different spring strengths are available. Please determine for yourself which spring variant best suits your accessories and ammunition loads.
We recommend installation by an AREX service dealer if you are unsure.