Ox Red Mainspring No.6 Air Rifle Spring
S3342
The Ox Red Mainspring No.6, distributed in the UK by Bisley, is a replacement mainspring for spring-piston air rifles. The No.6 fitment is made for the Weihrauch HW77 and HW97, the Feinwerkbau Sport, and larger original-pattern actions where the maximum legal power is wanted. It is the spring that drives the piston, so fitting a fresh one restores the firing cycle on a rifle that has gone tired, lost consistency or developed a rougher shot. This is an internal part rather than a bolt-on accessory, so fitting means stripping the action: the work calls for a mainspring compressor and a degree of experience, and the spring should be coated in a suitable high-pressure grease on assembly to cut noise and keep the cycle smooth. Always confirm the No.6 is the correct fitment for your particular model before ordering, as the Ox range covers several spring sizes across different rifles. For stalkers and pest controllers who lean on a quiet, accurate springer, a sound mainspring is the difference between a clean shot and a misbehaving rifle.
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