Prometheus Straight Chamber Packing for Marui AEG Rifle (Extra Soft)
If your hop-up adjustment is not having a big effect on the hop-up of your BBs, then it probably means that your hop-up packing is worn down and is not gripping the BB properly before it is fired out
It Will Allow More Accurate hop-up Adjustments
Suitable For Tokyo Marui AEG Rifle
Also Fit For Below 300 fps Rifle Airsoft Guns