Due to the demand and dedication we put into every order, please allow 4-6 weeks for SIEGE to ship your suppressor. We promise it will be worth the wait!
This is an NFA item and it must be transferred to your preferred FFL & SOT. Please email the FFL & SOT you would like to use for transfer along with your order number to: info@siegesuppressors.com
ABOUT THE ROC556L:
The ROC556L by Siege Suppressors uses Linear Diffuser Array technology.
Video - What happens inside of the Linear Diffuser Array? https://www.youtube.com/watch?v=II-aLNxDYxc
The ROC556L is built around a very high flow rate achieved by SIEGE’s patented Linear Diffuser Array, which pushes gases, unburnt powder, and other particulate matter forward through a sequence of flow cells so they exit cleanly at the muzzle. That high flow rate keeps gas-operated rifles cycling naturally with less tuning required and directs contaminants downrange instead of back into the action or the shooter’s face. The result is consistent, quiet shooting with no cleaning or disassembly needed, and every ROC556L is bonded into a single monolithic structure for exceptional strength, erosion resistance, and long service life.
SPECS:
Caliber: 5.56mm
Length: 7.95”
Length w/o mount: 7.45"
Diameter: 1.5”
Weight: 19.96 oz
Materials: Precipitation Hardening SS & Inconel Linear Diffuser Array
Finish: Nitride
Full Auto Rated
No Barrel Length Restrictions
WHATS IN THE BOX:
ROC556L Suppressor
2 - Siege Spanner wrenches
Siege STRONGHOLD HUB Adapter & DEFENDER 2 Port Brake 1/2x28 - Plan B Compatible
5.56mm closed removable endcap
1 reviews for ROC556L - Includes: STRONGHOLD HUB Adapter & DEFENDER 2 Port Muzzle Brake
Chad Griffin
Jul 08, 2025WOW! I just took this out yesterday and man did the Siege ROC556L Impress! Its everything and more than I expected. For me, the sound reduction was great, but the bonus was how reduced the felt recoil was. Also, there was very little gas blown back in my face one typically gets with suppressed carbines. At the end of the day Im a very happy owner of the Siege ROC556L!
