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Due to Measure 114, Rainier Arms will prioritize order shipments to Oregon state residents.

Partial Upper Receivers

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  1. Rainier Arms RUC PRO MK1 5.56 NATO Partial Upper Receiver - 10.5
    Rainier Arms RUC PRO MK1 5.56 NATO Partial Upper Receiver - 10.5"
    As low as $550.00
  2. Sons of Liberty Gun Works Stripped Upper Receiver
    Sons of Liberty Gun Works Stripped Upper Receiver
    Special Price $113.99 Regular Price $142.50
  3. Bootleg Mil Spec AR-15 .223 Wylde CamLok (M-Lok) Partial Upper
    Bootleg Mil Spec AR-15 .223 Wylde CamLok (M-Lok) Partial Upper
    As low as $379.00
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