This hard type packing is designed to match high power upgrades at 400fps+. High power upgrades require a harder hop-up packing since softer material may deform from the higher power.
However if your gun shoots below 400fps, then stay with the soft type packing since otherwise this hard type will not grip the BB properly on low power configurations.
Checkout process is SSL encrypted.![KG36 Commando [2nd Generation]](images/imagecache/KWA%20g36c.jpg "KG36 Commando [2nd Generation]"){kind=small}
