Heat gradation

part of the Ronin M-Series

while the other is a bit more special

These batteries are

CowCow Technology Trident Sear Spring for Tokyo Marui Hi-Capa 9MM Heat gradationTrident Sear Spring was made by high electrical spring steel which provide lighter and much crispy trigger pull feeling. Its enhancing design that narrow down the contact surface to reduce friction with other components. The durable material and enhanced design drive a consistent and rapid trigger reaction to players enjoy every single shot. It is suitable for use with Tokyo Marui, AW Custom, WE Tech, KJW and other compatible Hi CAPA 1911 Series