A.P.S. Hammer Spring for ACP601 GBB Pistol
Essential part for upgrading your Airsoft AEG Hammer Spring Set
To build a tight & durable gearbox
Replacement of gearbox internal springs
This Hammer spring is very strong
It is designed for APS ACP601 Pistol Use
Suitable for ACP601 Series Airsoft Gas Blow Back GBB Pistol
