AIP 140% Enhanced Recoil/Hammer Spring For Hi-capa 5.1/4.3 Extended Cap - HOP-UP chamber x1(CNC aluminum

- HOP-UP chamber x1(CNC aluminum body+anodized+TNTlettering)

- Complete Bolt Carrier (Negative Pressure)(Gold Chromic Coating)

21AT/21BT/22/22A/22AT/22E/25/26/27/28/31AT/31BT/41AT/41BT/42/42A/

+ High-visibility to make it easy to check if there is shotshell left

It has a low friction characteristic which can smooth the action to the nozzle and prevent scratches to the aluminum nozzle due to heavy use

AIP 140% Enhanced Recoil/Hammer Spring For Hi-capa 5.1/4.3 Extended Cap - HOP-UP chamber x1(CNC aluminumProduction Model : AIP031 Best use in Conjunction with Metal Slide Outer Barrel + High Flow Blowoff Valve Recoil Spring produces stronger & faster blowback feel Hammer Spring increase the hammer tension resulting higher gas output, i. e. more power fps Suitable for Marui Hi Capa 5. 1 4. 3 Series Airsoft Gas Blow Black GBB Pistol As always, upgrading GBB require necessary skill & technique, consult expertise if needed Major Color : Chrome Built