CowCow Trident Sear Spring Safety's this hop-up chamber is designed

this hop-up chamber is designed specifically to meet the Tokyo Marui specification

1 version so will fit 5

designed to improve sight visibility and target acquisition

Slight increase in FPS and accuracy

You get the idea

CowCow Trident Sear Spring Safety's this hop-up chamber is designedFar better than the Stock Sear (Leaf) Spring. Due to it being made of steel it holds its shape far better than stock TM ones. This is definitely needed if you are planning on tuning your trigger to be short and crisp. This is one of the best Sear springs out there due to its perfect tolerances, no need to shave down to fit in your grip. *Will only fit TM spec grips(not WE AW)