The Worlds NO.1 square spring. The perfect replacement or upgrade for standard mainsprings.
NO.1 FITS – BSA Airsporter, Lightning, Anschutz 335, Original 35, 38, 45, 50, RWS 24, 27, 34, 45, 50 relum, HW50, HW55, HW57, HW85, HW90, HW99, Haenel Lion, ASI CF 16/20, Webley Mk3 if the spring guide is reduced by 20 thou
The NEW OX Accelerator mainspring is Furnace Bake-Coated with MOLYBDENUM & PTFE For Progressive Lubrication & Rapid Acceleration For Up To 40 per cent more compressed poundage than conventional mainsprings. Worth a little extra.
Remember that the number of coils and diameter are important, the old spring will be shorter as it is worn out. Remember the legal limit without an FAC is that it must be under 12 foot pounds. Requires some knowledge and tools to fit. May need to be shortened to obtain the correct legal power limit.