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HSA M170 Upgrade Spring for VSR-10-Bar10 (570-600Fps)

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Description: HSA Upgrade M170 Spring for VSR-10/Bar10 Specifications: HSA 570-600FPS Upgrade M170 Spring for Marui VSR-10/Bar10 and other compatible Spring rifles. We Recommend To used This High Power spring only in Rifles with Reinforced Trigger Sears, Spring Guide and Piston