SIEGE ROC556L
IMPORTANT: LIMITED TIME ONLY
Please do not add a tax stamp to your order for this promotion, our system will add it after purchase.
Select your dealer to see all offers
Find a dealer


We handle all ATF paperwork for Powered Dealers
![]()
#1 in the
NFA Industry
![]()
100% Satisfaction
Guaranteed
![]()
Free Ground
Shipping
IMPORTANT: LIMITED TIME ONLY
Please do not add a tax stamp to your order for this promotion, our system will add it after purchase.
For a LIMITED TIME ONLY, a Free tax stamp is included with purchase of this product through Silencer Shop’s website. (Please note dates are subject to change based on inventory). The tax stamp will automatically be added to your order after checkout.
Please Note that if the product is backorderable, you can still place a backorder during the promotional time frame to take advantage of this offer. Your free tax stamp will be applied when your order is filled.
The Siege ROC556L brings an exceptional level of suppression to your firearm, skillfully blending innovative engineering with meticulous attention to detail. Distinguished by its seamless, contemporary exterior crafted through proprietary manufacturing processes, the ROC556L is designed to deliver elite sound attenuation, reduced flash signature, and minimized back pressure. Its sophisticated internal architecture ensures consistent performance, reduced maintenance, and unmatched durability, making it perfect for rigorous tactical missions, precision shooting sports, and dedicated recreational use.
FEATURES & BENEFITS OF THE ROC556L:
- Innovative Diffuser Array Technology: Provides superior suppression and effectively redirects gases to minimize both noise and visible flash.
- Maintenance-Minimizing Design: Unique internal cell geometry ensures reduced fouling, significantly easing long-term maintenance.
- Universal Mounting Versatility: Offers compatibility with both Direct Thread and Siege’s Stronghold Quick Detach (QD) adapters, featuring the versatile 1.375x24 HUB mount.
- Robust Monolithic Construction: Enhanced resistance to erosion and wear, built from premium materials for consistent reliability and extended service life.
- Lifetime Assurance: Siege’s lifetime warranty underscores the ROC556L’s exceptional quality and enduring performance.
TECHNICAL SPECIFICATIONS
- Length:
- w/ DT Adapter: 7.20"
- w/ Stronghold Adapter: 7.45"
- Weight:
- w/ DT Adapter: 18.70 oz
- w/ Stronghold Adapter: 18.83 oz
- Diameter: 1.5”
- Material: Premium Stainless Steel and Aerospace-grade Alloys
- Finish: Matte Black Cerakote
- Barrel Length Restrictions: None
WHAT’S IN THE BOX
- ROC556L Suppressor
- 2 - Siege Spanner wrenches
- Siege OMNIHEX Direct Thread Mount
- 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.
| Dimensions | 1x1x1 |
|---|---|
| Coating Type | Black Nitride |


