In Stock and Ready to ShipFeatures:Thread Pitch: 1/2x28 Mounting Interface: Plan B / 1.375x24 “HUB” compatible Adds 1.5" to overall barrel length – ideal for pin & weld setups Material: 17-4 PH stainless steel Finish: Black nitride Made in Oregon Backed by our Lifetime Warranty This 2-port brake delivers serious recoil control while offering a direct-mount interface for Plan B style suppressors and other HUB-compatible systems. Whether you're running suppressed or not, the Defender keeps your AR flat and fast. Perfect for converting 14.5" barrels to 16" legal OAL with pin & weld. 

In Stock and Ready to ShipFeatures:Thread Pitch: 5/8x24 Mounting Interface: Plan B / 1.375x24 “HUB” compatible Adds 1.5" to overall barrel length – ideal for pin & weld setups Material: 17-4 PH stainless steel Finish: Black nitride Made in Oregon Backed by our Lifetime Warranty This 2-port brake delivers serious recoil control while offering a direct-mount interface for Plan B style suppressors and other HUB-compatible systems. Whether you're running suppressed or not, the Defender keeps your AR flat and fast. Perfect for converting 14.5" barrels to 16" legal OAL with pin & weld.

In Stock and Ready to ShipFeatures:Thread Pitch: 1/2x28 Mounting Interface: Plan B / 1.375x24 “HUB” compatible Material: 17-4 PH stainless steel Finish: Black nitride Made in Oregon Backed by our Lifetime Warranty The Havoc flash hider is built for shooters who want maximum flash suppression with suppressor-ready mounting. Its open 4-prong design disperses muzzle flash while remaining compatible with Plan B and other HUB-thread suppressors. Designed for durability and precision in real-world conditions.

In Stock and Ready to ShipFeatures:Thread Pitch: 5/8x24 Mounting Interface: Plan B / 1.375x24 “HUB” compatible Material: 17-4 PH stainless steel Finish: Black nitride Made in Oregon Backed by our Lifetime Warranty The Havoc flash hider is built for shooters who want maximum flash suppression with suppressor-ready mounting. Its open 4-prong design disperses muzzle flash while remaining compatible with Plan B and other HUB-thread suppressors. Designed for durability and precision in real-world conditions.

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 ROC556K:The ROC556K by Siege Suppressors uses Linear Diffuser Array technology.Video -  What happens inside of the Linear Diffuser Array?  https://www.youtube.com/watch?v=II-aLNxDYxcThe ROC556K 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 ROC556K is bonded into a single monolithic structure for exceptional strength, erosion resistance, and long service life. SPECS:Caliber: 5.56mmLength w/ DT Adapter: 5.43"Length w/o mount: 5.18"Diameter: 1.5”Weight w/ DT adapter: 14.55 ozWeight w/o adapter: 12.78 ozMaterials: Precipitation Hardening SS & Inconel Linear Diffuser ArrayFinish: NitrideFull Auto RatedNo Barrel Length RestrictionsWHATS IN THE BOX:ROC556K Suppressor2 - Siege Spanner wrenchesSiege OMNIHEX Direct Thread Mount5.56mm vented removable endcap

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 ROC556K:The ROC556K by Siege Suppressors uses Linear Diffuser Array technology.Video -  What happens inside of the Linear Diffuser Array?  https://www.youtube.com/watch?v=II-aLNxDYxcThe ROC556K 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 ROC556K is bonded into a single monolithic structure for exceptional strength, erosion resistance, and long service life. SPECS:Caliber: 5.56mmLength w/ STRONGHOLD adapter: 5.68"Length w/o mount: 5.18"Diameter: 1.5”Weight w/ STRONGHOLD adapter: 14.68ozWeight w/o adapter: 12.78ozMaterials: Precipitation Hardening SS & Inconel Linear Diffuser ArrayFinish: NitrideFull Auto RatedNo Barrel Length RestrictionsWHATS IN THE BOX:ROC556K Suppressor2 - Siege Spanner wrenchesSiege STRONGHOLD HUB Adapter & DEFENDER 2 Port Brake 1/2x28 - Plan B Compatible5.56mm vented removable endcap

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-aLNxDYxcThe 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: 5.56mmLength: 7.70”Length w/o mount: 7.45"Diameter: 1.5”Weight: 18.06 ozMaterials: Precipitation Hardening SS & Inconel Linear Diffuser ArrayFinish: NitrideFull Auto RatedNo Barrel Length RestrictionsWHATS IN THE BOX:ROC556L Suppressor2 - Siege Spanner wrenchesSiege OMNIHEX Direct Thread Mount5.56mm vented removable endcap

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-aLNxDYxcThe 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: 5.56mmLength: 7.95”Length w/o mount: 7.45"Diameter: 1.5”Weight: 19.96 ozMaterials: Precipitation Hardening SS & Inconel Linear Diffuser ArrayFinish: NitrideFull Auto RatedNo Barrel Length RestrictionsWHATS IN THE BOX:ROC556L Suppressor2 - Siege Spanner wrenchesSiege STRONGHOLD HUB Adapter & DEFENDER 2 Port Brake 1/2x28 - Plan B Compatible5.56mm closed removable endcap

Features:Converts suppressors with 1.375x24 “HUB” threads to Plan B Material: 17-4 PH stainless steelFinish: Black nitride Precision machined Made in OregonBacked by our Lifetime Warranty The Stronghold adapter allows you to run Plan-B threaded muzzle devices on any suppressor with a HUB-style (1.375x24) rear thread. Built to exact tolerances, it's the ideal solution for cross-platform suppressor setups. 

Siege LABYRINTH Compensator Plan B Compatible - 1/2x28 - 5.56mm

Siege LABYRINTH Compensator Plan B Compatible - 5/8x24 - 7.62mm