OUTER PARTS

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  【MA-543】Master Mod Ready MK18 EBB Upper Gearbox (M120 Spring)

  OUTER PARTS

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  【MA-525A】Master Mod Ready CS4/CXP EBB Upper Gearbox (Full Capacity Cylinder/M120 Spring)

  OUTER PARTS

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  【MA-525】CS4/CXP EBB Upper Gearbox (Full Capacity Cylinder/M120 Spring)

  OUTER PARTS

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  【MA-193A】Master Mod Ready CS4/CXP EBB Upper Gearbox (M120 Spring)

  OUTER PARTS

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  【MA-463A】MARS PDW9 Reinforced Upgrade EBB Upper Gearbox (M110 Spring)

  OUTER PARTS

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  【MA-463】MARS PDW9 EBB Upper Gearbox (M110 Spring)

  OUTER PARTS

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  【Discontinued】【MA-60】CS4 STANDARD UPPER GEARBOX ASSEMBLY (M100 Spring)

  OUTER PARTS

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  【MA-193】CXP-UK1/HOG/YAK UPPER GEARBOX EBB (M120 Spring)

  OUTER PARTS

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  【MA-197】CB PLASTIC GEARBOX (6 mm Bushing Box, M80 Spring)

  OUTER PARTS

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  【MA-198】CB Metal GEARBOX (7 mm Bushing Box, M100 Spring)

  OUTER PARTS

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  【MA-293】CXP-APE UPPER GEARBOX ASSEMBLY (M120 Spring)

  OUTER PARTS

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  【Discontinued】【MA-340】CS4 STANDARD UPPER GEARBOX ASSEMBLY (M120 Spring)

  OUTER PARTS