Systema Advance Series Bore-Up Cylinder Set for Airsoft MP5 AEGs with Free Shipping!
Essential part for upgrading your Airsoft Electric Gun AEG MP5-A4 Compression & Release Parts for Higher Power Upgrade Players When upgrade player using stronger spring, the stronger tension gives higher performance & power "Dunble-Bumper" system is employed to both piston head & cylinder head to prevent breakage As always, upgrading AEG require necessary skill & technique to dissemble the gearbox, consult expertise if needed Package Includes: 1. Stainless Bore-Up Cylinder Head 2. Bore-Up Air Seal Nozzle 3. Bore-Up Double Bumper Piston Head 4. Bore-Up Chromium Plating Cylinder Bore-Up Cylinder Set need to be used with M120 ~ M170 AEG Spring (Recommended by Systema)