Surefire 3-prong flash hider SF3P-556-1/2-28 SOCOM

ships from our shop in 3 to 5 days (+/-), WHEN IN-STOCK
Maximum Purchase:
2 units

Surefire 5.56mm 3-Prong Flash Hider - Suppressor Mount

SF3P-556-1/2-28: Trusted by the US Special Operations Command

The Surefire SF3P-556-1/2-28 three-prong flash hider, which fits M4/M16 weapons and variants with 1/2x28 muzzle threads, features a patent-pending design that greatly reduces muzzle flash—typically greater than 99%—when compared with a plain muzzle. Boasting robust tines built to withstand the rigors of combat, the SF3P-556-1/2-28 also serves as a rock-solid mounting adapter for SureFire SOCOM Series 5.56 mm Fast-Attach suppressors, the SOCOM556-RC model having placed first in the most extensive and rigorous suppressor testing ever conducted by US Special Operations Command.


  • Three-prong flash hiders with Surefire’s renowned performance and durability
  • Typically reduces more than 99% muzzle flash
  • Multiple bearing surfaces for accurate suppressor alignment
  • Fits: M4, M16 and variants, and most 5.56mm rifles with 1/2"-28 thread pattern
  • Common and versatile design, found on many high-end rifles, and allows for mounting of many Surefire suppressors
  • Multiple bearing surfaces provide superior suppressor alignment and prevent ringing of tines inside suppressor
  • Made from U.S. mill-certified, heat-treated stainless steel that is highly resistant to corrosion and gas/particle erosion
  • High-precision single-point cut barrel threads create optimum thread interface
  • Inspected for all critical dimensions including concentricity and alignment

Superior Muzzle Flash Suppression

Experience unparalleled performance with the Surefire SF3P-556-1/2-28 Flash Hider/Suppressor Adapter. This marvel of engineering delivers staggering muzzle flash suppression, typically reducing the flash by over 99% compared to a plain muzzle. Crafted meticulously from US mill-certified heat-treated stainless steel, this three-prong flash hider showcases a patent-pending design built for excellence. Whether you're in a combat situation or a shooting range, the robust tines offer unmatched durability.

Rock-Solid Suppressor Adapter

More than just a flash hider, the SF3P-556-1/2-28 serves as a sturdy mounting adapter for SureFire SOCOM Series 5.56mm Fast-Attach suppressors. This adapter champions unparalleled alignment, preventing the audible ringing of tines inside the suppressor. The design features multiple bearing surfaces for superior suppressor alignment, ensuring your shots are accurate and on point every time.

Enhanced Protection and Ease of Cleaning

The SF3P-556-1/2-28 Flash Hider isn't just about performance, it's about longevity. Protected by a black Ionbond DLC coating, it offers maximum protection under harsh environmental conditions. Even after extreme use, you'll find cleaning to be a breeze, allowing for sustained performance over time. SureFire's No-Hassle Guarantee also covers each flash hider, ensuring your investment is well protected.

Exceptional Compatibility

The Surefire SF3P-556-1/2-28 Flash Hider/Suppressor Adapter is not just about performance, it's about seamless integration. Specifically designed to fit M4/M16 weapons and variants with 1/2x28 muzzle threads, it allows for a precise and secure attachment. Furthermore, it mounts all SureFire SOCOM Series 5.56mm/.223 caliber sound suppressors, providing an array of options for your weapon customization. Please note, this flash hider/suppressor adapter is not compatible with previous Surefire Fast-Attach sound suppressors, muzzle brakes, or flash hiders.

Precision Engineered for Optimal Performance

When it comes to the precision of your shots, the SF3P-556-1/2-28 Flash Hider leaves no stone unturned. It's crafted with high-precision single-point cut threads for optimal thread interface. This means your shots are not just accurate, but consistently so. Furthermore, the rear labyrinth seal minimizes potential carbon buildup in the indexing system, facilitating suppressor removal after extended firing.

Tested and Approved by the Best

The SF3P-556-1/2-28 isn't just another accessory—it's a piece of engineering trusted by the best. The SOCOM556-RC model has placed first in the most extensive and rigorous suppressor testing ever conducted by US Special Operations Command. When you choose the SF3P-556-1/2-28, you're choosing a product that has been put to the test and come out on top.

NOTE: Surefire SOCOM Series Fast-Attach sound suppressors, flash hider/suppressor adapters, and muzzle brake/suppressor adapters are not compatible with previous generation Surefire Fast-Attach sound suppressors, muzzle brakes, or flash hiders. 


  • CONSTRUCTION:  Heat Treated Stainless Steel
  • COATING:  DLC Coating (Ionbonding)
  • LENGTH:  2.6 in (can be used with 14-1/2 barrel to pin and weld to 16")
  • WEIGHT:  3.9 oz

Sufefire 3-prong 

Manufacturer's Part Number:  SF3P-556-1/2-28

NSN:  1005-01-626-8770

Package includes:

  • Surefire 3-prong flash hider
  • a variety of shims
  • small container of Rocksett (this could dry-up over time, and need to be replaced)
  • no wrench is included, you can add Surefire 3-Prong Wrench here
  • may ship in retail pack, or in small plastic bag (occasionally we need to remove retail packaging to save on space in our storage bins)

Charlie's recommends installation by a gunsmith or qualified armorer.  While this can be a DIY project, it is important to get the timing correct and also to apply the correct Rocksett to assure your mount does not cause damage to your suppressor.

Currently limiting to two (2) products per order per person