The latest model update from Weihrauch sport is the 1/2" threaded barrel for the HW98. This now comes as standard. The end cap screws off to reveal a 1/2" UNF thread to which a Weihrauch HW98 silencer can be fitted. The HW98 silencer has been specially designed for this model to fit flush with the barrel. Order your HW98 silencer as an additional extra when placing your order.