Mainspring RED No.6 by OX
For the following Air guns No.6 Spring is for Hw77 & Hw77K HW97 & HW97K Feinwerkbau (Fwb) Sport GAMO 610 Also All Larger Original Models if ultimate power is required SPRING MEASURES 21mm x 320mm internal diameter is 15mm 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 the gun 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.
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