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Can this be matched up to any lower? Does it require a milspec or commercial lower? — 1 Answer

by Brandon, from FL, United States Asked on April 14, 2021

Name Radical Firearms Complete Upper Assembly .450 Bushmaster, 15in MHR, Single Ramp, Black, Box (3.7)
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Answered by Kurt Colbourne, Gear Expert, from IL, United States, on September 14, 2021

The mil-spec vs commercial dimensions pertain to the buffer system only. This upper will fit any AR-15 lower.

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