Gold Eagel Seal set for M870 (Ajustable Stock) | FREE Delivery over €50 (ROI)
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The GOLDEN EAGLE MC-89B is a replacement seal kit made specifically for M870 series gas pump-action shotguns fitted with a bufferstock. Designed to restore airtight performance, it fixes leaks, stabilizes FPS, and returns consistent cycling for rifles whose seals have worn or degraded.
Intended only for M870 models that use a bufferstock configuration (not for gas-tank variants), the kit is straightforward to fit during routine maintenance or repair. A small parts kit that prevents misfires and preserves valve life — essential for keeping your pump-action reliable in the field.