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Is this handguard compatible with a Nbs billet 9mm upper receiver? — 1 Answer

by Tater, from OR, United States Asked on July 26, 2026

Name Phase 5 Weapon Systems Inc Lo-Pro Free Float Slope Nose Qual Rail w/M-LOK (4.4)
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Answered by Phase 5 WSI, Manufacturer from CA, United States, on July 29, 2026

Yes. The Phase 5 LPSN MLOK rail should work with the NBS billet 9mm upper without issue.

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Last updated 2026-07-27 UTC.