Home » Shop » Dead Air Armament Sierra 5, Suppressor, 5.56 NATO, 4.87″ Length, 1.5″ Diameter, Stainless Steel Construction, W/keymo Black
Sale!
DEAD AIR SIERRA 5 556 W/KEYMO BLACK

Original price was: $979.00.Current price is: $839.00.

🔇 NFA made simple — we are an SOT/Class III dealer and walk you through the entire ATF process in-house. Questions? Call (817) 393-4000 before you buy.
Product Code: DAASIERRA5KM Category: Brand:

Dead Air Sierra 5 5.56 KeyMo black suppressor — compact AR-15 NFA can, KeyMo QD. $0 stamp (OBBBA). Western Sport TX.

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Product Description

⚠ NFA ITEM — SUPPRESSOR
This is a federally regulated suppressor under the National Firearms Act. Purchase requires BATFE Form 4 transfer, background check, and $200 NFA tax stamp — now $0 under the One Big Beautiful Bill Act (OBBBA). Buyer must be 21+, US citizen, NFA-legal state, no disqualifying criminal history. Allow about two weeks or less for ATF approval. Western Sport handles all paperwork — call 817-393-4000.

Dead Air Sierra 5 5.56 Suppressor — KeyMo | Black

The Dead Air Sierra 5 KeyMo Black is a compact 5.56 suppressor with Dead Air’s ratcheting KeyMo quick-detach mount. Fast attach/detach, rattle-free lock, works with any KeyMo muzzle device.

Spec Detail
5.56 NATO / .223 Rem Caliber
KeyMo — Dead Air ratcheting QD Mount
Black Finish
Suppressor — Form 4, $0 stamp NFA Class

FAQ

KeyMo device required? Yes — KeyMo muzzle device sold separately. Calibers? 5.56 NATO, .223, and smaller. Buy? 817-393-4000, Western Sport Roanoke TX. $0 NFA stamp.

Why Buy From Western Sport?

Western Sport is a licensed FFL/SOT dealer in Roanoke, Texas (North Texas). FFL/SOT since 2007. We handle all Form 4 NFA paperwork. Call 817-393-4000.

Recent eForm 4 approvals have been coming back in about two weeks or less — see our NFA wait times guide for current figures.

Additional information

Weight 1.938 lbs
Brand Dead Air Armament
Caliber

Finish

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First suppressor? Here is how buying one actually works.

Western Sport has been an SOT / Class III dealer in Roanoke, Texas since 2007. You buy the can here, we hold it in the safe, and we file the ATF paperwork for you — fingerprints and photo included. Your federal tax stamp is $0.

NFA Made Simple — the step-by-step
What the August 2026 court ruling actually changed
Questions? Call us at (817) 393-4000.

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