SureFire SOCOM Shim Kits: Ensures Precise Muzzle Device Timing

Perfect muzzle device timing every time: Eliminate guesswork and ensure the proper, precise alignment of your SureFire muzzle device on your rifle barrel. This guarantees maximum performance for both the device and any attached suppressor.
Prevents dangerous baffle strikes: Achieve perfect alignment that is critical for safely and securely mounting a SureFire SOCOM suppressor, preventing misalignment that could lead to dangerous and costly baffle strikes.
Simple, error-proof installation: No measuring is required. The shims are color-coded by thickness, allowing you to easily select the right combination to achieve exact 12-o'clock alignment, streamlining the entire assembly process.
Compatible with various SureFire muzzle devices: Different kit variants are available to match specific SureFire muzzle devices and calibers. This ensures you get the exact shims needed for a perfect fit and function with your weapon system.
- Z-70031
  - FH556RC-1/2-28 (SOCOM 4-Prong Flash Hider for 5.56mm)
- Z-70121
  - FH762RC-5/8-24 (SOCOM 4-Prong Flash Hider for 7.62mm)
- Z-71652
  - SF3P-556-1/2-28 (SOCOM 3-Prong Flash Hider for 5.56mm)
  - SFA2-556-1/2-28
  - SFCT-556-1/2-28 (SOCOM Closed-Tine Flash Hider for 5.56 mm)
  - SFMB-556-1/2-28 (SOCOM Muzzle Brake for 5.56mm)
  - WARCOMP-556-1/2-28 (WARCOMP Flash Hider for 5.56mm)
  - WARCOMP-556-CTN-1/2-28 (Closed-Tine WARCOMP Flash Hider for 5.56mm)
  - SF3P-762-1/2-28
- Z-71657
  - SFMB-65-5/8-24
  - SF3P-762-5/8-24 (SOCOM 3-Prong Flash Hider for 7.62mm)
  - SFMB-762-5/8-24 (SOCOM Muzzle Brake for 7.62mm)
  - WARCOMP-762-5/8-24 (WARCOMP Flash Hider for 7.62mm)
  - SFMB-338-5/8-24

What are some common accessories to add to the SureFire Shim Kit?

SOCOM 3-Prong Installation Wrench: This dedicated wrench is essential for properly torquing and securing the muzzle device onto your barrel once the correct shim configuration is determined, ensuring a tight and reliable fit.
SOCOM Muzzle Brake or Flash Hider: The shims are designed to work specifically with the SureFire SOCOM line of muzzle devices, such as the SFMB Muzzle Brake or the SF3P Flash Hider, providing the crucial suppressor-attachment interface.
Rocksett: A high-temperature ceramic adhesive used to secure the muzzle device once it is timed and torqued. It ensures the device will not loosen under extreme heat and rapid fire.

SureFire Shims Features and Specs

Achieving the critical 12 o’clock timing of a muzzle device is effortless with the SureFire SOCOM Shim Kit. This solution provides everything needed to ensure precise alignment for all SOCOM suppressors and muzzle devices. The included shims are precision-machined from robust 300-series stainless steel, offering unparalleled durability and a lifetime of service on your firearm.

Key Features

Color-Coded System: Shims are distinctly colored to denote thickness, eliminating the guesswork of measuring and ensuring fast, straightforward installation for proper alignment.
Durable Stainless Steel Construction: Built from 300-series stainless steel for superior corrosion resistance and longevity under harsh conditions and continuous firing.
Versatile Fit: Includes multiple shims of varying thicknesses that can be used alone or stacked together to achieve the exact rotational alignment required for your specific SOCOM muzzle device.
Critical Suppressor Alignment: Guarantees the necessary muzzle device timing to protect against baffle strikes when attaching a SureFire SOCOM Fast-Attach® Sound Suppressor.

Technical Specifications

Material: 300-Series Stainless Steel
Manufacturing: Precision Machined
Compatibility: SureFire SOCOM Adapter Muzzle Devices (FH556RC, FH762RC, SF3P, SFCT, SFMB, and WARCOMP lines)
Origin: Designed and Built in the USA

What's in the box of the Shim Kit by SureFire?

(1) Set of Color-Coded Shims

Shim Kit FAQs

What is the primary function of the SOCOM Shim Kit?

The primary function is to ensure the precise and correct timing or rotational alignment of a SureFire SOCOM muzzle device on a rifle barrel. This alignment is critical for safely and correctly mounting a SOCOM suppressor.

I’m not sure which shim kit to buy. I don’t even know if I’m in the right place. What should I do?

You’re here because, most probably, you searched for one of the things below:

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If you did, you’re in the right place. This product page contains all the available shim kit variants for all of SureFire’s muzzle devices. We have the variants and list of compatible devices at the top of the page. But if you’re still unsure or you can’t find your muzzle device, please send us a message so that we can help you.

What are the shims made of?

The shims are constructed from durable, long-lasting 300-series stainless steel, ensuring high resistance to corrosion and heat.

How do I know which shim to use?

The shims are color-coded by thickness, which eliminates the need for measuring. You can use the shims individually or combine them to achieve the correct alignment for your muzzle device.

Are these shims compatible with non-SureFire muzzle devices?

These shim kits are specifically designed and tested to ensure precise fit and function with the SureFire SOCOM line of muzzle devices and are not guaranteed to work with other brands.

Why is proper muzzle device timing important?

Proper timing ensures the muzzle device is correctly oriented (usually at 12 o’clock). When a suppressor is attached, correct timing is essential to prevent costly and potentially dangerous baffle strikes.