SIEGE ROC556K

Get a Free $200 Silencer Shop gift card when you purchase this product through Silencer Shop’s website, for a limited time, you will receive your Silencer Shop gift card via email to the address listed on your Silencer Shop account approximately 48 hours after your eForm 4 is submitted to the ATF. Gift card may be applied to any future transaction on our site.

The Siege ROC556K is a cutting-edge suppressor that seamlessly combines precision craftsmanship with advanced engineering, delivering superior sound suppression and tremendous durability. Designed for versatility, the ROC556K features two mounting options—direct thread or the rock-solid Stronghold Quick Detach (QD) system—both utilizing the universal 1.375x24 HUB mount. With its self-cleaning internal geometry, advanced linear diffuser array, and robust monolithic construction, this suppressor excels in demanding shooting conditions, ensuring reliability and peak performance every time. Ideal for tactical, competition, and recreational shooters, the ROC556K stands out with new suppressor technology.

• Advanced Linear Diffuser Array:  Radially redirects gases to dramatically reduce sound, pressure, and flash signatures.
• Self-Cleaning Internal Geometry: Engineered flow cells minimize fouling, enhancing longevity.
• Dual Mounting Options: Compatible with direct thread or Stronghold QD mounts, both featuring the 1.375x24 HUB mount for universal adaptability.
• Extreme Durability: Monolithic structure and contiguous bore provide exceptional resistance to erosion and wear.
• Lifetime Warranty: Siege guarantees long-term reliability and peace of mind for your investment.

• Length:
  • w/ DT Adapter: 5.43"
  • w/ Stronghold Adapter: 5.68"
• Weight:
  • w/ DT Adapter: 14.55 oz
  • w/ Stronghold Adapter: 14.68 oz
• Diameter: 1.5”
• Finish: Matte Black Cerakote
• Material: Stainless Steel and Aerospace-grade Alloys

• ROC556K Suppressor
• 2 - Siege Spanner wrenches
• Siege STRONGHOLD HUB Adapter & DEFENDER 2 Port Brake 1/2x28 - Plan B Compatible
• 5.56mm vented removable endcap

Curious about the tax stamp change? Learn more here.

New to suppressors? See how to buy a silencer in minutes.