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M058 M4 Aluminum Upper & Lower Receiver Set

SKU: SB-M058 G-ForceOut of stock

  • Zinc alloy construction
  • Compatible with most standard M4 / M16 AEGs
  • Functional ready bolt catch
  • Includes mag catch, guide pin. rear lock bolt w/ retention clip, and front bolt


In the Box

1X Upper Receiver

1X Lower Receiver

1X Mag catch

1X Guide Pin

1X Rear Lock Bolt w/ Retention Clip

1X Front Lock Bolt


Build Full Metal
Compatibility Most M4 / M16 AEGs

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