Weihrauch HW100 Valve Spring

This is a factory replacement valve spring for all HW100 models. This item is power output specific depending on if your have a sub12/16J variant or an FAC HW100. Generally the FAC valve spring is longer than the SUB12/16J spring. After market springs may vary also. Please check before ordering this item.

You have also require the valve stem/firing valve or valve seat, these items are sold separately.

When fitting this part or working on any air rifle we do advise that the user has access to a chronograph, as installing this part may alter the output of your air rifle.