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  1. Rainier Arms Exclusive Rainier Arms / Rellim Arms AR-15 .223 Wylde Take Down Upper Receiver Assembly - 8.5"
    Rainier Arms / Rellim Arms AR-15 .223 Wylde Take Down Upper Receiver Assembly - 8.5"
    $1,199.99
    Out of stock
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  2. Rainier Arms Exclusive Rainier Arms / Rellim Arms AR-15 5.56 NATO Take Down Upper Receiver Assembly - 16"
    Rainier Arms / Rellim Arms AR-15 5.56 NATO Take Down Upper Receiver Assembly - 16"
    $1,199.99
    Out of stock
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  3. Rainier Arms RUC PRO Mk1 Riflespeed Partial Upper Receiver - 11.5"
    Rainier Arms RUC PRO Mk1 Riflespeed Partial Upper Receiver - 11.5"
    $750.00
    Out of stock
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  4. Rainier Arms RUC PRO Mk1 5.56 NATO Riflespeed Partial Upper Receiver - 12"
    Rainier Arms RUC PRO Mk1 5.56 NATO Riflespeed Partial Upper Receiver - 12"
    $750.00
    Out of stock
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