Product Overview
The Sig Sauer Clutch-Lok Flash Hider 5.56mm is a suppressor-support component intended for a specific mounting, attachment, alignment, service, or configuration role. Suppressor accessories are highly system-specific, so the suppressor model, host firearm, barrel thread pattern, mounting standard, caliber, and manufacturer part number should all be confirmed before purchase.
Key Features and Specifications
- Product Type: Suppressor-Compatible Flash Hider
- Caliber or Bore: 5.56mm
Why These Features Matter
Product Type: Suppressor-Compatible Flash Hider
Correct identification matters because pistons, boosters, fixed mounts, front caps, muzzle devices, spacers, and adapters perform different jobs.
Caliber or Bore: 5.56mm
Caliber or bore clearance must support the intended cartridge and projectile diameter.
Choosing a Suppressor-Compatible Muzzle Device
Match the muzzle device to the exact suppressor mounting family and barrel thread pattern. QD systems generally require their own approved muzzle devices.
Confirm caliber or bore clearance. A muzzle device must safely pass the projectile and remain compatible with the suppressor mount.
Muzzle brakes, flash hiders, and compensators serve different unsuppressed roles, but the mounting interface and suppressor lockup are the primary concerns for suppressed use.
Some devices require timing with shims. Follow the manufacturer installation sequence and torque specifications rather than using generic methods.
Installation, Alignment, and Maintenance
Unload the firearm completely before installation or inspection. Follow both the firearm and suppressor manufacturer instructions.
Clean the barrel threads and mating surfaces, then install the component using the specified torque, shims, timing method, and thread treatment. Do not improvise with crush washers unless the manufacturer expressly permits them.
Verify suppressor alignment with the correct equipment before firing, especially after changing mounts, muzzle devices, adapters, front caps, or host firearms.
Inspect threads, tapers, locking surfaces, pistons, springs, caps, mounts, and fasteners for carbon buildup, wear, deformation, looseness, or damage. Replace any component that no longer locks or aligns correctly.
Best For
- Owners matching an accessory to the exact suppressor and host-firearm system
- Direct-thread, QD, HUB, piston, booster, 3-lug, or muzzle-device configurations identified by the manufacturer
- Users who will verify thread pitch, caliber, alignment, torque, and installation requirements
TRA Take
A suppressor mount is only as reliable as the muzzle device beneath it. Correct thread pitch, timing, torque, bore clearance, and lockup must all be right.
Frequently Asked Questions
What type of suppressor accessory is this?
This product is classified as a suppressor-compatible flash hider based on the catalog information.
What caliber or bore is listed?
The catalog lists 5.56mm. Confirm the complete suppressor and host-firearm configuration supports the intended cartridge.
Is this accessory an NFA-regulated suppressor?
No. This listing is for an accessory or mounting component, not a serialized suppressor. Standard non-serialized accessories generally ship directly where legal.
Is professional installation recommended?
Professional installation or inspection is recommended whenever the part affects muzzle-device timing, suppressor alignment, mounting security, barrel threads, or safe projectile clearance.
How should alignment be checked?
Follow the suppressor manufacturer procedure and use appropriate alignment equipment before firing, especially after changing mounts, adapters, muzzle devices, caps, or host firearms.
Can similar-looking mounts be substituted?
No. Similar appearance does not confirm compatible dimensions, thread pitch, locking geometry, or caliber clearance. Use only manufacturer-approved combinations.
What is the manufacturer part number?
The manufacturer part number is SL-556-12X28-90DEG-F.
Shipping and Installation Information
This listing is for a non-serialized suppressor accessory and generally ships directly where legal. It is not a suppressor and does not itself require an NFA transfer. Some muzzle devices, adapters, tools, or components may be restricted by destination or intended configuration. Confirm lawful use and follow all manufacturer installation, torque, timing, alignment, cleaning, and inspection instructions.
Why Buy From Tar River Arms
- Veteran-Owned Firearms Dealer
- Secure Online Checkout
- Nationwide Accessory Shipping Where Legal
- Local Pickup Available in Raleigh, North Carolina
- Professional Product Guidance and Gunsmithing Support
- Descriptions Focused on Actual Mounting and Compatibility Requirements
Product Identification
Manufacturer Part Number: SL-556-12X28-90DEG-F
UPC: 798681656189
Use these identifiers to distinguish this configuration from similar mounts, adapters, pistons, caps, and muzzle devices.