Standard BSA Mainspring
Standard Factory Replacement Mainspring.
Genuine BSA Part
This spare fits the following models:
BSA Airsporter Mk 1, 2, 3, 4, 5, 6, 7, Centenary, RB2, S Models, Stutzen
BSA Goldstar
BSA Lightning, XL, XLT, Gamo Made
BSA Mercury Mk 1, 2, 3, 4, Challenger, 635 Magnum
BSA Supersport
BSA Superstar
Weihrauch HW77
Weihrauch HW97 (Standard Power)
