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Do these uppers happen to work with the New Frontier C-5 lower that uses MP5 magazines? I know NFA used to sell a complete gun with this upper. — 1 Answer

by Matt, from MI, United States Asked on February 6, 2023

Name R&D Precision PW9 Colt/Glock 9mm 5 inch Upper Receiver Kit (4.4)
$616.89 $550.98 Save 11%
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Answered by Ethan, Gear Expert, from IL, United States, on January 25, 2024

The R&D Precision PW9 9mm Gen 1 Bufferless Upper Kit will not work with the New Frontier Arms C5 or S9 that use MP5 magazines.

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