Slug spring for our high capacity FX impact magazine
177, 4.5MM spring tension 1.5 turns
22, 5.5MM spring tension 2 turns
25, 6.35MM spring tension 2 turns
30, 7.62MM spring tension 2 turns
35, 9MM spring tension 2 turns
Spring tension can or need be adjusted depending on the types of slugs and weights being used.
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