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 linear diffuser array is engineered to redirect propellant gasses radially through an arrangement of turbulent and laminar flow cells. Each series of cells flows into the next until propellant, lead, copper, and carbon are expelled at the exit. The internal geometries greatly reduce the potential for long-term build-up or fouling. It is by design, self-cleaning
The same design mechanism that promotes the free flow of gasses from cell to cell also diminishes back pressure significantly. The large surface area and the unique diffuser geometries effectively reduce the sound and flash signature without the excessive blowback experienced with more common designs.
Reducing excess back pressure removes a major cause of over-pressure-induced failures and maintains the host weapon's inherent reliability. An added benefit of a low back pressure design is an improved shooter experience with less gas presented to the shooter’s face when using AR and bullpup-type weapons.
Siege Suppressors also offer extreme durability and erosion resistance due to the design of the diffuser array, monolithic structure, and contiguous bore. Siege suppressors are designed to use a contiguous bore within the linear diffuser array, different from any other suppressor. The contiguous bore is a design feature that offers increased erosion resistance compared to conventional designs due to the flow characteristics of propellant gasses and unburned gunpowder through the suppressor. Because there are no angular features and no baffles used in the internal construction of the suppressor, the propellant gasses and unburned gunpowder have no angular barriers to react against and therefore erode over time.
In a Siege Suppressor, propellant gasses and unburnt gunpowder travel around the diffuser array, down the contiguous bore, and out of the muzzle end of the suppressor. The unique flow of gasses within a Siege Suppressor provides a suppressor that is less prone to internal erosion from propellant gasses and unburnt gunpowder when compared to traditional baffled suppressor designs.
SPECS:
Caliber: 5.56mm
Length: 7.70”
Length w/o mount: 7.45"
Diameter: 1.5”
Weight: 18.06 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 OMNIHEX Direct Thread Mount
5.56mm vented removable endcap
4 reviews for ROC556L - Includes: 1/2x28 Direct Thread Adapter
Josh Smith
Apr 28, 2025Phenomenal suppressor! The technology is out of this world, I’ve shot a lot of 556 cans and I’d argue this one being one of the quietest out there. No blowback, no flash , sounds great ! Highly recommend.
Camron H Branom
Jan 29, 2025An outstanding suppressor. No gas to my face when I used it on my SOLGW 13.9. The tone is awesome. One of the best suppressors I used.
Jason W.
Jan 13, 2025This suppressor is outstanding. Shipping was fast, and right out of the box this can performed exceedingly well! Minimal zero shift, and the performance expectations followed through on every other category. It has a smooth recoil impulse as well as minimal gas back to the chamber/my face, when shooting. I could tell the difference between shooting this against baffled suppressors and for my needs as a user, I prefer how this can performs when the finer points of cleanliness and design are considered. I am looking forward to what else Paul and his team will be bringing to market. This is definitely a game changer. Their commitment to quality and top tier customer service is an added bonus!
JASON W
Dec 24, 2024This suppressor is a HUGE upgrade! Reduced back pressure, smooth recoil impulse and a noticeable reduction in gas getting back to the mag/my face. Held zero just fine as well. Its also not too bulky and is the first of more Siege cans that I will be purchasing. The customer service is top notch and kudos to you guys at Siege for bringing such a great product to market!
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