Dead Air Sierra 5 XM w/ Xeno Adapter & 1/2-28 Xeno FH - SIERRA5XM
Save 17% MSRP: $899.00$749.00
Only 1 left in stock
View Restrictions
This item is regulated, therefore this item must be shipped to an FFL. After you place the order, you will be able to find and submit an FFL of your choosing. It is your responsibility to know your local laws and confirm that the FFL will accept and transfer the item.
View Restrictions
THIS IS A CLASS 3 NFA ITEM. ALL NFA RULES APPLY, this product requires a Federal Firearms License (FFL) and a Special Occupational Tax Stamp (SOT) to be on file. It is the purchaser’s responsibility locate a properly licensed FFL. If we do not have a copy of the clearly signed and dated FFL/SOT, you may email them to [email protected] or use our FFL submission form. Read more about our process here.
NFA Item Cancellation & Refund Policy
Cancellations with Full refunds of NFA items are only possible if a cancellation request is received & acknowledged before the transfer process has been initiated. Initiation of the transfer process is defined as: The ATF form 3 which allows us to transfer the NFA item to your selected dealer has been submitted to the ATF. The ATF form 3 submission typically occurs 1-3 days after your order is placed, depending on order volume and processing times. Cancellations and partial refunds are still possible up until the point the NFA item is shipped to your FFL dealer. Below are the fees that will apply at the various stages of NFA item order processing:
- Order Received – Form 3 not yet submitted: Full refund
- Form 3 Submitted – Not yet approved by ATF: 10% Processing Fee
- Form 3 Approved by ATF – Item not Shipped: 20% Processing Fee
- Form 3 Approved by ATF – Item shipped: No refund
- Form 4 Submitted – Disapproved/Returned without action: 35% Processing Fee + return shipping costs*
*NOTE: This may not always be possible and requires us to successfully recover the NFA item from your dealer with original packaging and in NEW condition. If we are unable to recover the NFA item in the condition stated above, no refund is possible.
This policy is only a guideline and subject to change depending on certain situations. There is significant time and effort involved by both AR15Discounts and your selected dealer to reacquire the item once the ATF form 3 has been submitted and approved.
SKU: 37120 Category: Suppressors
Engineered for demanding tactical applications, the Dead Air Sierra 5 XM delivers exceptional sound and flash suppression in a compact, hard-use package. This dedicated 5.56 NATO suppressor arrives ready to mount with the included Xeno adapter and 1/2-28 Xeno flash hider, providing immediate compatibility for your AR-platform rifle while offering full HUB modularity for future customization.
Key Features
- Fully welded Cobalt 6 baffles wrapped in a stainless steel tube for unmatched durability under heavy firing schedules and full-auto use
- Compact design with knurled outer tube for secure handling and easy attachment of heat-protective wraps
- Xeno quick-detach system included for fast, repeatable mounting on 1/2-28 threaded barrels
- HUB-compatible 1.375-24” rear socket enables easy swaps to KeyMo, direct thread, or other adapters
- Low backpressure and short pressure impulse reduce shooter fatigue and maintain reliable cycling
- Flash hider front cap enhances visual signature reduction during low-light operations
Benefits for Tactical Shooters
The Sierra 5 XM solves common pain points for professionals and enthusiasts alike: excessive muzzle blast, visible flash, and cumbersome mounting. Its optimized baffle geometry balances superior sound reduction with minimal added length and weight, while the full-auto rating and lack of barrel restrictions ensure reliable performance whether on a short-barreled rifle or during sustained fire. The included Xeno components deliver tool-free installation and removal, letting you focus on the mission rather than equipment hassle.
Technical Specifications
- Caliber Rating: 5.56 NATO, .224 Valkyrie
- Energy Rating: 2200+ ft-lbs
- Bore Diameter: 5.56mm
- Length: 4.87 inches (no adapter); 5.72 inches (with Xeno adapter)
- Diameter: 1.5 inches
- Weight: 10.8 ounces (no adapter); 13.3 ounces (with Xeno adapter)
- Materials: Cobalt 6 baffles, stainless steel outer tube
- Finish: Black Cerakote
- Mounting: Xeno adapter and 1/2-28 Xeno flash hider included; HUB 1.375-24” compatible
- Ratings: Full-auto rated, no barrel length restrictions
Why Choose the Dead Air Sierra 5 XM
Built with function-first engineering, this suppressor prioritizes real-world reliability over lightweight gimmicks. The proven combination of high-strength materials and thoughtful design makes it the last 5.56 suppressor many users will ever need, offering professional-grade performance in a versatile, user-configurable package.
Upgrade your rifle’s signature reduction today with the Dead Air Sierra 5 XM and experience the difference of purpose-built tactical gear.
| Weight | 4 oz |
|---|---|
| Dimensions | 2 × 1.8 × 1.8 in |
| MPN | SIERRA5XM |
| UPC | 810128160018 |
Compliance
NFA (National Firearms Act) compliance is crucial for legal ownership and transfer of regulated firearms and accessories like short-barreled rifles, suppressors, and certain types of ammunition, ensuring adherence to federal regulations to avoid legal penalties and ensure responsible firearm ownership.
Please select an FFL from the table below, if you do not see your desired FFL, click "Set Later" and you will be able to enter your FFL's information after checkout.
| Name | City | State | ZIP | Phone | |
|---|---|---|---|---|---|
|
Loading FFL contacts, please wait...
|


