Daniel Defense Soundguard SG-556 1/2-28 Black Muzzle Device
$773.00
$804.00
(You save
$31.00
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- Finish-Color:
- Black
The Daniel Defense Soundguard SG-556 1/2-28 is a .223/5.56mm suppressor engineered to reduce noise, gas blowback, and muzzle flash while keeping your rifle nimble and your follow-up shots on target. Built around proprietary gas-flow dynamics licensed from KGM Suppressors, the SG-556 pushes most exhaust gases forward rather than back toward your face—a meaningful advantage during sustained fire or in tight quarters where blowback becomes fatiguing and visibility matters. If you're running an AR-platform rifle and want hearing protection without the typical trade-offs in handling, this is a serious contender.
The suppressor's design philosophy centers on three things: noise reduction, accuracy, and durability. The patent-pending baffle stack and proprietary internal coating work together to minimize both impulse noise and flash signature. Daniel Defense claims negligible point-of-impact shift thanks to gas-flow stabilization—a real concern when you're dialing in a precision rifle or building a reliable duty setup. At 22 ounces with the included mounting adapter, it adds weight but won't sag your barrel. The stainless steel construction is field-tough; this isn't a safe queen.
Attachment is straightforward: the included adapter uses the industry-standard HUB 1.375-24 UNS mount (1/2x28 TPI) and clips on or off in seconds. That same HUB interface also gives you flexibility to swap other muzzle devices like Keymo or ASR attachments without buying a new suppressor. Made in the USA and covered by Daniel Defense's 100% Satisfaction Guarantee.
Key Features
- Gas-flow design reduces backblast and toxic gas blowback toward the shooter
- Patent-pending baffle stack and proprietary coating minimize flash signature
- Lightweight stainless steel construction (22 oz with mount) won't compromise handling
- Quick-attach/detach via industry-standard HUB 1.375-24 UNS adapter
- Stabilized gas path for minimal point-of-impact shift
- Compatible with Keymo and ASR for modular muzzle device options
- Made in the USA
Specifications
| Caliber Compatibility | .223 Remington / 5.56 NATO |
| Mounting Thread | 1/2x28 TPI (HUB 1.375-24 UNS adapter included) |
| Length | 7 inches |
| Tube Diameter | 1.75 inches |
| Weight (with mount) | 22.0 ounces |
| Material | Stainless steel tube and baffle stack |
| Manufacturing | USA made |
Frequently Asked Questions
What rifles will the SG-556 fit?
The SG-556 is designed for .223 Remington and 5.56 NATO rifles, most commonly AR-15 platforms and other rifles threaded 1/2x28. It requires a 1/2x28 muzzle thread; the included adapter handles the HUB 1.375-24 UNS connection.
Can I use other muzzle attachments with the HUB mount?
Yes. The HUB 1.375-24 UNS standard used by the included adapter is compatible with other HUB-standard devices, as well as Keymo and ASR attachments, giving you flexibility to configure your rifle as needed.
What's included with the suppressor?
The SG-556 ships with a mounting adapter that uses the HUB 1.375-24 UNS standard for quick attachment and detachment.
How much does the SG-556 weigh and how long is it?
With the included mount, the SG-556 weighs 22 ounces and measures 7 inches long, with a tube diameter of 1.75 inches—compact enough for most modern rifle builds.
Firearm Shipments:
To buy rifles or shotguns, you must be 18 years old, and for handguns, actions, or receivers, the minimum age is 21. By placing an order for this firearm, you confirm that you are the legitimate transferee/buyer, meet the legal age requirements, and comply with all Federal, State, and local laws and regulations necessary to purchase this firearm.
We only ship firearms to valid Federal Firearms License (FFL) holders. At checkout we provide a FFL locator for your convenience.
We will need a copy of the FFL’s license to facilitate the process, kindly request your dealer to email us a copy of their FFL, as we cannot dispatch the firearm until we receive this document. It is imperative for the buyer to choose their FFL dealer, ensure they are willing to facilitate the transfer, and have them email their FFL copy to BOSQUE Outdoors. To avoid any confusion, the customer's name or order number must be mentioned in the email containing the FFL.
Email: [email protected]
- Prior to placing an order, it is the buyer's responsibility to understand and adhere to their state's firearm regulations.
- The buyer should verify with their receiving dealer that the chosen firearm is legally permissible in their state.
- The buyer is accountable for any transfer fees or background check charges imposed by the receiving dealer. If the designated dealer declines to accept the firearm delivery, the buyer assumes responsibility for shipping costs to retrieve the firearm and resend it to an accommodating dealer.
- Handguns will be shipped using air transportation, while long guns can be shipped using ground methods. If your order includes a mix of firearm and non-firearm items, BOSQUE Outdoors will send the firearm(s) to your selected FFL dealer and the remaining non-firearm items to your billing address.
- Firearms cannot be returned to BOSQUE Outdoors; please contact the manufacturer for warranty claims.
- Firearms refused by the FFL Dealer or which cannot be transferred due to a failed background check are subject to a $75 restocking fee plus 10% of the purchase price.
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