Replacement O Ring for SMW Weihrauch HW100 Magazines (and OEM 177 magazine)
SMW Engineering HW100 magazines magazines use BS124 O Rings which are 31.42mm inner diameter and 36.66mm outer (2.62 cross section diameter). These are the same o rings used in OEM 177 magazines.
The price below is per single o ring. Note that post will be added at checkout.