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Comstock Armory HPA HUB Extended Plan-B Suppressor Adapter, Titanium, PVD
The Comstock HPA Titanium HUB Adapter is a purpose-built component for shooters assembling a compact, repeatable Plan-B-pattern suppressor mounting system. It combines Grade 5 titanium, a PVD finish and clearly defined tool flats to support secure installation and convenient suppressor attachment. The product uses 1.375-24 HUB/Bravo threads and is compatible with Comstock, Rearden and other common Plan-B-pattern muzzle devices.
It converts a compatible suppressor rear interface to the widely used Plan-B-pattern mounting system, allowing quick attachment to compatible Comstock, Rearden and similar muzzle devices. The extended profile provides 0.4 inch more blast-chamber space than the standard LPA, helping accommodate longer muzzle devices when the complete system has sufficient clearance.
Ready to complete your suppressor-mounting setup? Review fitment, confirm compatibility and add the Comstock HPA Titanium HUB Adapter to your cart at BattleHawk Armory.
Extended Clearance for Plan-B Muzzle Devices
A properly matched adapter can make it easier to move a compatible suppressor among multiple hosts while maintaining a compact, repeatable mounting interface. This adapter provides dedicated wrench flats for controlled installation and is built from premium material selected for strength, heat resistance and long service life.
Key Features and Specifications
- Model: HPA-B-TI
- Primary thread/interface: 1.375-24 HUB/Bravo
- Material: Grade 5 titanium
- Finish: PVD
- Weight: 1.1 oz
- Overall profile: extended profile
- Added system length: 0.7 in
- Installation interface: 1-7/16 in wrench flats and 1.5 in spanner notches
- Caliber/bore guidance: dependent on the suppressor and muzzle-device combination
- Mounting compatibility: Comstock, Rearden and other common Plan-B-pattern muzzle devices
Fitment and Installation Guidance
Adds about 0.4 in more blast-chamber space than a standard LPA; the 1.08 in rear section requires sufficient clearance beneath the exact handguard. Before attaching any suppressor, verify bullet stability and confirm that the muzzle device, adapter and suppressor are concentric. Use an appropriate alignment rod and follow the current installation instructions supplied by Comstock Armory. Some suppressor manufacturers limit warranty coverage when aftermarket mounts or muzzle devices are used, so review the suppressor manufacturer's warranty and compatibility requirements before installation.
Get yours today at BattleHawk Armory. Choose the correct configuration, verify your complete system and purchase the Comstock HPA Titanium HUB Adapter from a trusted online retailer.
Frequently Asked Questions
What mounting system is the HPA-B-TI designed for?
It is designed around the Plan-B-pattern ecosystem and the specific 1.375-24 HUB/Bravo interface listed above. Compatibility depends on the complete suppressor, adapter, muzzle-device and barrel configuration.
Is this adapter a suppressor?
No. It is a mounting adapter for a compatible suppressor. The suppressor, muzzle device and any required tools are separate components.
How do I confirm suppressor fitment before firing?
Check every thread specification, available blast-chamber depth, muzzle-device length and caliber rating. After installation, verify alignment with a proper alignment rod and follow all firearm, ammunition and suppressor manufacturer instructions.
Use only on a compatible firearm and suppressor system. Installation should be performed by a qualified person when the user is not fully familiar with muzzle-device or suppressor-mount installation.
Product Identification
- Manufacturer SKU: HPA-B-TI
- UPC: 850069580360
Shop the Comstock Armory HPA-B-TI at BattleHawk Armory.
| Manufacturer | Comstock Armory |
| Model | HUB Adapter |
| UPC | 850069580360 |
| SKU | HPA-B-TI |



FFL Required