Dead Air Sierra 5 with Keymo Adapt

Dead Air Sierra 5 with Keymo Adapt — factory-new from an authorized Dead Air dealer. Built for 5.56mm (.223) with KeyMo QD mount.

NFA Item. Requires ATF Form 4 transfer through Redacted Tactical Supply or your local SOT dealer. The federal transfer tax for suppressors is $0 as of January 1, 2026; all registration, fingerprint, photograph, and NICS requirements still apply. See our NFA Process page for the full procedure.

Questions on configuration, mounts, or availability? Call (970) 463-2486 — FFL Type 07 / SOT Class 02, Arvada, Colorado.