Plan B HUB Mount
Most suppressor mounts make you choose. Direct thread holds zero and costs nothing, then carbon welds the can to the muzzle and you spend an evening getting it…
- Lifetime Warranty on All Products
- Ships Within 48 Hours
- In Stock Guaranteed
Fit question? Email team@copperheadsafety.com or use the contact page with your trigger, BCG and caliber. We answer during business hours, Mon–Fri.
Most suppressor mounts make you choose. Direct thread holds zero and costs nothing, then carbon welds the can to the muzzle and you spend an evening getting it off. Quick-detach comes off clean, and it puts a collar, a lever, and another set of tolerances between your barrel and your point of impact.
Plan B takes a third path. Every Plan B muzzle device carries a precision taper behind its threads. The suppressor threads down until that taper seats, and from there the taper does the work: it centers the can, it locates it the same way every time, and it seals.
What this part is
The HUB Mount is the suppressor half of the system. It threads into the 1.375x24 HUB rear cap on your can and gives it a Plan B interface. Buy it once and every Plan B muzzle device you own becomes a host for that suppressor.
Why the taper matters
- Your zero survives the swap. A thread alone locates a suppressor loosely. The taper seats against a machined cone and pulls the can concentric with the bore every time you mount it, so moving the suppressor between hosts stops costing you a trip to the range.
- Carbon stays out of the threads. The taper seals where gas would otherwise get in. That is the difference between a can that unthreads by hand after a long weekend and one that needs heat and a strap wrench.
- Nothing extra in the gas path. No collar, no spring, no locking lever to carbon up or wear loose. Fewer parts in the hottest place on the rifle.
- It stays short. 2.5 ounces and a low profile, so you are not giving back the length you paid for in a compact can.
Specifications
| Suppressor thread | 1.375x24 (Bravo HUB) |
| Material | 17-4 stainless steel |
| Finish | Nitride |
| Weight | 2.5 oz |
| Wrench flats | 1-1/16" |
What you need to run it
A suppressor with a 1.375x24 HUB rear cap, and a Plan B muzzle device in your barrel’s thread pitch. The compatibility chart below covers 199 silencers tested by PEW Science so you can check your can before you order.
Install the muzzle device with Rocksett and torque it to 20–25 ft-lbs on the milled flats.
Worth knowing
This mount mates to Plan B muzzle devices. It will not adapt your can to ASR, KeyMo, or tri-lug.
Caliber and host ratings come from your suppressor and your muzzle device. This adapter does not raise or lower them.
Some suppressor manufacturers limit warranty coverage when you run a third-party muzzle device. Check yours before you commit.
Compatibility
The Plan B HUB Mount threads onto any suppressor with a 1.375x24 HUB rear cap. Below is every silencer independently tested by PEW Science, checked against the manufacturer’s own specification.
Check yours in 15 seconds
1. Unthread the rear cap off the back of your suppressor.
2. Check the internal thread. HUB is 1.375x24.
3. Make sure the HUB cap is the one installed. Some cans ship with a proprietary cap and sell the HUB cap separately.
Fits84 silencers
Rear cap is 1.375x24 HUB from the factory. Thread the mount straight on.
| Silencer | Maker | PEW rating |
|---|---|---|
| 762-SDN-6 | AAC | 68.9 Bolt-Action Rifle / Subsonic 300BLK |
| Theorem-L | Abel Company | 47.2 Bolt-Action Rifle / Supersonic .308 |
| Lahar-30 | Aero Precision | 29.5 MK18 Semi-Auto Rifle / Supersonic 5.56 |
| Lahar-30L | Aero Precision | 46.4 Bolt-Action Rifle / Supersonic .308 |
| Mod 1 (Solid) | BOE | 44.1 M4A1 Semi-Auto Rifle / Supersonic 5.56 |
| Chairman | BOSS | 43.5 Bolt-Action Rifle / Supersonic .308 |
| Guillotine | BOSS | 32.0 MK18 Semi-Auto Rifle / Supersonic 5.56 |
| CAT/AKB | CAT | 32.9 SR-25 Semi-Auto Rifle / Supersonic .308 |
| CAT/DD/A1 | CAT | 32.6 Bolt-Action Rifle / Supersonic .308 |
| CAT/JL/A1 | CAT | 53.8 Bolt-Action Rifle / Supersonic .308 |
| CAT/MOB/A1 | CAT | 65.3 Subgun (PCC) / Subsonic 9mm |
| CAT/ODB/A1/718 | CAT | 67.2 Bolt-Action Rifle / Subsonic 300BLK |
| CAT/ST | CAT | 53.7 M4A1 Semi-Auto Rifle / Supersonic 5.56 |
| CAT/WB/A1/718 | CAT | 41.0 M4A1 Semi-Auto Rifle / Supersonic 5.56 |
| Maximus-L | Centurion Arms | 40.3 MK18 Semi-Auto Rifle / Supersonic 5.56 |
| Helios QD (Solid End-Cap) | CGS Group | 44.5 Bolt-Action Rifle / Supersonic .308 |
| Helios QD (Vented End-Cap) | CGS Group | 24.5 MK18 Semi-Auto Rifle / Supersonic 5.56 |
| Lazarus 6 (DT) | Dead Air Silencers | 29.4 MK18 Semi-Auto Rifle / Supersonic 5.56 |
| Lazarus 6 (Xeno) | Dead Air Silencers | 30.8 MK18 Semi-Auto Rifle / Supersonic 5.56 |
| Nomad-L | Dead Air Silencers | 52.0 Bolt-Action Rifle / Supersonic .308 |
| Enticer L-Ti | Diligent Defense Co. | 65.5 Bolt-Action Rifle / Subsonic 300BLK |
| Enticer S-Ti | Diligent Defense Co. | 59.7 Bolt-Action Rifle / Subsonic 300BLK |
| DRC308 | Dillon | 25.9 SR-25 Semi-Auto Rifle / Supersonic .308 |
| DRC556 | Dillon | 43.7 M4A1 Semi-Auto Rifle / Supersonic 5.56 |
| X1R556-Ti | Echo Zulu Defense | 42.0 M4A1 Semi-Auto Rifle / Supersonic 5.56 |
| ARX | Energetic Armament | 21.5 MK18 Semi-Auto Rifle / Supersonic 5.56 |
| VOX S | Energetic Armament | 48.4 Bolt-Action Rifle / Subsonic 300BLK |
| VOX S (Wiped) | Energetic Armament | 58.9 Bolt-Action Rifle / Subsonic 300BLK |
| Monarch 7.62 | FOR Systems | 44.9 Bolt-Action Rifle / Supersonic .308 |
| Monarch Recce | FOR Systems | 33.3 MK18 Semi-Auto Rifle / Supersonic 5.56 |
| Neutron 7.62 | Gemtech | 38.4 Bolt-Action Rifle / Supersonic .308 |
| Dreyes 30 | Inert Haze | 48.2 Bolt-Action Rifle / Supersonic .308 |
| PRO-KOR 556K | JK Armament | 40.4 MK18 Semi-Auto Rifle / Supersonic 5.56 |
| R30 (Closed) | KGM | 39.9 Bolt-Action Rifle / Supersonic .308 |
| R30 (Vented) | KGM | 39.3 Bolt-Action Rifle / Supersonic .308 |
| Anthem-K | Liberty Precision Machine | 35.3 Bolt-Action Rifle / Supersonic .308 |
| Anthem-S | Liberty Precision Machine | 45.3 Bolt-Action Rifle / Supersonic .308 |
| Anthem-S2 QD | Liberty Precision Machine | 68.4 Bolt-Action Rifle / Subsonic 300BLK |
| Mach-L | Liberty Precision Machine | 72.8 Bolt-Action Rifle / Subsonic 300BLK |
| Torch (Solid) | Liberty Precision Machine | 35.9 MK18 Semi-Auto Rifle / Supersonic 5.56 |
| Torch (Vented) | Liberty Precision Machine | 29.8 MK18 Semi-Auto Rifle / Supersonic 5.56 |
| ION LT (556 End Cap) | LMT AT | 30.9 MK18 Semi-Auto Rifle / Supersonic 5.56 |
| EDS-30L | Magco Arms | 53.3 Bolt-Action Rifle / Supersonic .308 |
| DSX | Maxim Defense | 39.8 10.3 SURG Semi-Auto Rifle / Supersonic 5.56 |
| Hydrogen-L | Otter Creek Labs | 70.1 Bolt-Action Rifle / Subsonic 300BLK |
| Infinity (5.56 Solid) | Otter Creek Labs | 40.2 MK18 Semi-Auto Rifle / Supersonic 5.56 |
| Infinity (5.56 Vented) | Otter Creek Labs | 37.8 M4A1 Semi-Auto Rifle / Supersonic 5.56 |
| Infinity (7.62 Solid) | Otter Creek Labs | 60.1 Bolt-Action Rifle / Subsonic 300BLK |
| Infinity (7.62 Vented) | Otter Creek Labs | 36.1 M4A1 Semi-Auto Rifle / Supersonic 5.56 |
| Infinity 556K (Full Vent) | Otter Creek Labs | 33.8 MK18 Semi-Auto Rifle / Supersonic 5.56 |
| Infinity 556K (Partial Vent) | Otter Creek Labs | 38.0 MK18 Semi-Auto Rifle / Supersonic 5.56 |
| Infinity 556K (Solid) | Otter Creek Labs | 36.4 MK18 Semi-Auto Rifle / Supersonic 5.56 |
| Lithium | Otter Creek Labs | 55.4 Subgun (PCC) / Subsonic 9mm |
| OCM5 | Otter Creek Labs | 42.6 M4A1 Semi-Auto Rifle / Supersonic 5.56 |
| Polonium | Otter Creek Labs | 37.7 MK18 Semi-Auto Rifle / Supersonic 5.56 |
| Polonium-30 | Otter Creek Labs | 37.1 Bolt-Action Rifle / Supersonic .308 |
| Polonium-K | Otter Creek Labs | 32.5 MK18 Semi-Auto Rifle / Supersonic 5.56 |
| PR30L | Otter Creek Labs | 46.4 Bolt-Action Rifle / Supersonic .308 |
| PR30S | Otter Creek Labs | 37.2 Bolt-Action Rifle / Supersonic .308 |
| Universe-36 | Otter Creek Labs | 60.0 Subgun (PCC) / Subsonic 9mm |
| TiTrex 300 | Precision Armament | 44.3 Bolt-Action Rifle / Supersonic .308 |
| VENT 1 | PTR | 57.3 Bolt-Action Rifle / Supersonic .308 |
| VENT 3 | PTR | 42.6 MK18 Semi-Auto Rifle / Supersonic 5.56 |
| VENT Spiritus 556i | PTR | 44.2 M4A1 Semi-Auto Rifle / Supersonic 5.56 |
| BDE 556 (Long) | PWS | 36.1 MK18 Semi-Auto Rifle / Supersonic 5.56 |
| BDE 556 (Short) | PWS | 30.8 MK18 Semi-Auto Rifle / Supersonic 5.56 |
| BDE 762 (Long) | PWS | 48.7 Bolt-Action Rifle / Supersonic .308 |
| BDE 762 (Short) | PWS | 40.4 Bolt-Action Rifle / Supersonic .308 |
| Carson 30 | Rampart Range | 29.9 SR-25 Semi-Auto Rifle / Supersonic .308 |
| Carson 556 | Rampart Range | 42.5 MK18 Semi-Auto Rifle / Supersonic 5.56 |
| Jolene | Resilient Suppressors | 67.6 Bolt-Action Rifle / Subsonic 300BLK |
| Putnik | Resilient Suppressors | 36.0 Bulgarian AK (S) / Supersonic 7.62x39 |
| RS9 | Resilient Suppressors | 61.5 PDW Subgun (PCC) / Subsonic 9mm |
| Surge (Long) | Rugged Suppressors | 42.9 Bolt-Action Rifle / Supersonic .308 |
| Surge (Short) | Rugged Suppressors | 32.1 Bolt-Action Rifle / Supersonic .308 |
| Omega 300 | SilencerCo | 38.3 Bolt-Action Rifle / Supersonic .308 |
| Tisha | Stealth Additive Works | 49.6 MK18 Semi-Auto Rifle / Supersonic 5.56 |
| Vorix 30 Ti | T&K | 66.4 Bolt-Action Rifle / Subsonic 300BLK |
| 5.56 XL (12-Baffle) | Tuna Cans | 41.0 M4A1 Semi-Auto Rifle / Supersonic 5.56 |
| WRMFZY 5.56 | Tuna Cans | 41.3 M4A1 Semi-Auto Rifle / Supersonic 5.56 |
| Disruptor 556 | Wolfpack Armory | 27.6 M4A1 Semi-Auto Rifle / Supersonic 5.56 |
| Resonator K | Yankee Hill Machine | 40.9 Bolt-Action Rifle / Subsonic 300BLK |
| Turbo T2 | Yankee Hill Machine | 29.8 MK18 Semi-Auto Rifle / Supersonic 5.56 |
| ZVUK | Zastava Arms | 33.7 Yugo AK / Supersonic 7.62x39 |
Fits with the HUB cap4
HUB-capable, but ships with a proprietary rear cap. You need the maker’s HUB end cap first.
| Silencer | Maker | Rear thread | PEW rating |
|---|---|---|---|
| Wolverine | Dead Air Silencers | proprietary rear; HUB via adapter | 23.5 Bulgarian AK / Supersonic 7.62x39 |
| Banish 30 (Long) | Silencer Central | 1.375x24 HUB via retrofit kit | 39.1 Bolt-Action Rifle / Supersonic .308 |
| Banish 30 (Short) | Silencer Central | 1.375x24 HUB via retrofit kit | 34.3 Bolt-Action Rifle / Supersonic .308 |
| ULTRA 9 | Thunder Beast Arms | 1.375x24 HUB (HUB variant only) | 46.1 Bolt-Action Rifle / Supersonic .308 |
Does not fit79
Proprietary or fixed rear threads with no HUB path.
| Maker | Models | Rear thread |
|---|---|---|
| AAC | Ti-RANT 9M-HD (Long), Ti-RANT 9M-HD (Short) | proprietary (ASAP piston / direct thread) |
| B&T USA | SIX 9 (Wiped Silencer) | 1/2x28 |
| CAT | CAT/BEN, CAT/KK, CAT/RAT Base, CAT/RAT COVERT, CAT/RAT FLOW, CAT/SC/B1 (Long), CAT/SC/B1 (Short), CAT/SR/A1, CAT/TSWIF | 1/2x28 direct thread; 1x16LH QD (proprietary); 1/2x28 piston; 1/2x28 QD |
| CGS Group | Hyperion, Hyperion K, MOD9 FS, SCI-SIX | 5/8x24 direct thread (SIG 25 deg taper); proprietary piston housing (1/2x28 piston); proprietary (permanent CGS ACME/taper mount) |
| Dead Air Silencers | Mojave 9 (Long), Mojave 9 (Short), Sandman-K, Sandman-L, Sandman-S, Sandman-Ti, Wolfman (Long), Wolfman (Short) | proprietary (P-Series 1.203-28); proprietary (KeyMount); 5/8-24 direct thread (fixed) |
| Griffin Armament | Optimus (9.4-in Full Size) | 1.2875x24 (Griffin) |
| HUXWRX (OSS) | CA$H 9K, FLOW 556 Ti, FLOW 556k, FLOW 762 Ti, HX-QD 556, HX-QD 556k, HX-QD 762 | 1.125x28 (SilencerCo Alpha); proprietary (HUXWRX Torque Lock, LH); proprietary (HUXWRX QD taper) |
| KAC | 5.56 QDC, 556 QDC/CRS-PRT (3-Prong), 556 QDC/CRS-PRT (MAMS), 556 QDC/MCQ-PRT (3-Prong), 556 QDC/MCQ-PRT (MAMS), QDSS-NT4 | proprietary (KAC QDC); proprietary (KAC NT4 gate latch) |
| Off Grid Suppressors | Operator Ti, Scorpius, Trident Ti | 1/2x28 direct thread; 5/8x24 direct thread |
| Otter Creek Labs | Titanium | 1/2x28 (fixed rear mount) |
| PTR | VENT 2 | 1.125x28 Alpha |
| PWS | BDE 22 | 1/2x28 direct thread |
| Q | Full Nelson, Half Nelson, Southpaw, Thunder Chicken, Trash Panda | 5/8-24 direct thread; proprietary (Q Quickie Fast-Attach taper) |
| Resilient Suppressors | Jessie's Girl | 1/2x28 direct thread |
| Rugged Suppressors | Obsidian 45 (Long), Obsidian 45 (Short), Obsidian 9 (Long), Obsidian 9 (Short), Oculus (Long), Oculus (Short), Radiant (Long), Radiant (Short), Razor556, Razor762 | proprietary (Obsidian piston/booster); 1/2x28 direct thread; proprietary (Dual Taper) |
| Savage Arms | AccuCan AC22, AccuCan AC30 | 1/2x28 direct thread; 5/8x24 direct thread |
| Sig Sauer | SRD762Ti-QD | proprietary Taper-Lok QD |
| SilencerCo | Harvester 300, Omega 9K, Saker 556, Sparrow, Velos LBP | 1.125x28 (Alpha); 1.375x32 (Charlie); proprietary (Delta, rimfire) |
| Surefire | SOCOM300-SPS (Flash Hider), SOCOM556-MINI2 (Flash Hider), SOCOM556-MINI2 (WARCOMP), SOCOM556-RC2 (Flash Hider), SOCOM556-RC2 (WARCOMP), SOCOM762-MINI2 (Flash Hider), SOCOM762-RC2 (Flash Hider), SOCOM762-RC2 (WARCOMP) | proprietary (SureFire Fast-Attach) |
| Sylvan Arms | SA223TIS, SA30TI | proprietary SAQD / 1/2-28 direct thread; proprietary SAQD / 5/8-24 direct thread |
| Thunder Beast Arms | Dominus-SR | proprietary (TBAC SR mount) |
Verify with the maker32
Mostly discontinued models with no current published specification. We would rather flag these than guess.
| Maker | Models | Rear thread |
|---|---|---|
| AAC | M4-2000 Mod 08, Ti-RANT 45, Ti-RANT 9, Ti-RANT 9M (Long), Ti-RANT 9M (Short) | unknown |
| B&T USA | Impulse-IIA SD Mk23 Rev. 03, SIX 9 (Training Silencer) | unknown |
| Battle Born Supply Co. | Whiskey Quebec 5.56, Whiskey Quebec 5.56 Purged | unknown |
| CAT | CACM 556 | unknown |
| Dead Air Silencers | Nomad-30 (1st Gen), Nomad-Ti | unknown |
| Engaged Industries | Operator 5.56 | unknown |
| FOR Systems | Predator 6.5 | unknown |
| GSL | Phoenix | unknown |
| Griffin Armament | Explorr EX3 | unknown |
| Inert Haze | Ti-P | unknown |
| KAC | MOD.MK23/USP | unknown |
| KGM | R556 | unknown |
| LayerX | Strake 9 | unknown |
| Mercy Firearms | Pluto | unknown |
| Microtech Defense | R2K9 (Long), R2K9 (Short) | unknown |
| Otter Creek Labs | OCM6 | unknown |
| Resilient Suppressors | RSP | unknown |
| Richmond Tactical | RT30Ti | unknown |
| SWR | Trident-9 | unknown |
| Sig Sauer | SLH300TI | unknown |
| Silencer Central | Banish 30 Gold | unknown |
| Strategic Sciences | MFMD+SDX | unknown |
| Surefire | SOCOM556-RC3 (Flash Hider), SOCOM556-RC3 (WARCOMP) | unknown |
- This mount mates to KAK Plan B muzzle devices. It is not an ASR, KeyMo, or tri-lug adapter.
- Your caliber and host rating come from the suppressor and the muzzle device, not from this mount.
- Some cans put 1.375x24 on an internal shoulder at a different seating depth. Check clearance before you torque anything down.
- Watch the near-misses: SilencerCo’s Charlie mount is 1.375x32, which reads as HUB and is not.
- A few suppressor makers void warranty coverage when you run a third-party muzzle device. Check yours.
Roster and Suppression Rating data from PEW Science, an independent suppressor test lab. Each rating is the highest overall score that silencer earned across 272 published tests, with the host and ammunition beside it. Fit verdicts come from manufacturer specifications. This chart is a guide — confirm with your suppressor manufacturer before you buy. Updated 2026-08-18.
Reviews
No reviews yet. Run one and tell us how it went.
