Surefire SOCOM556-RC2-BLK

The SureFire SOCOM556-RC2 is the suppressor selected by U.S. Special Operations Command for the M4 and Mk18 carbines — the result of what SureFire describes as the most extensive and rigorous suppressor testing ever conducted by SOCOM. It is chambered for 5.56 NATO with a 10-inch minimum barrel requirement, measures 6.4 inches in length and 1.5 inches in diameter, and weighs 17 oz. Construction is Inconel 718 and stainless steel with a high-temp Cerakote finish in black or Dark Earth. It attaches via SureFire's proprietary Fast-Attach system and is compatible with SureFire WARCOMPs, flash hiders, and muzzle brakes. The SOCOM556-RC2 is full-auto rated.

Features and Benefits

• SOCOM-certified: Selected by U.S. Special Operations Command for use on M4 and Mk18 carbines after extensive operational testing — the benchmark against which other 5.56 suppressors are measured
• Built from Inconel 718 and stainless steel for extreme heat tolerance and durability under sustained full-auto fire
• High-temp Cerakote finish resists corrosion and thermal degradation in field conditions
• SureFire Fast-Attach system mounts via SureFire WARCOMPs, SOCOM flash hiders, and SOCOM muzzle brakes — the lock ring uses a patented quarter-turn mechanism with an audible click confirmation and a permanent dry lubricant that requires no additional oiling
• Full-auto rated — consult the firing schedule section below for sustained-fire limits
• Patented fail-safe baffle design allows an unbalanced or defective projectile to pass through and continue downrange, preventing catastrophic baffle strikes
• Reduces sound, muzzle flash, and dust signature simultaneously
• Available in Black and Dark Earth (FDE)
• SureFire Lifetime Warranty for the original owner

Fast-Attach System

The SOCOM556-RC2 uses SureFire's patented Fast-Attach quick-detach system. To mount: depress the latch on the lock ring, rotate the lock ring to the unlocked position, slide the suppressor over the adapter, rotate until the indexing slot seats onto the adapter's indexing tab, then rotate the lock ring to locked until rotation stops — audible clicks will be heard. The lock ring should rotate approximately 180 degrees during installation. If it does not, the suppressor is not fully seated; remove and repeat.

When attaching to a host firearm for the first time, verify suppressor alignment using a bore rod before firing a suppressed shot. Contact SureFire Technical Support at 714-545-9444 if alignment is questionable.

Firing Schedule

The SOCOM556-RC2 is full-auto rated, but SureFire recommends limiting sustained fire to no more than 90 rounds before allowing the suppressor to cool. Firing beyond 120 rounds at high rate can create cookoff conditions — clear stoppages quickly and leave the chamber empty if this threshold is approached. The suppressor surface will reach temperatures that can cause severe burns after live-fire operations — allow adequate cooling time before handling.

Maintenance

The SOCOM556-RC2 requires minimal routine maintenance. For field cleaning, brush and scrape carbon and copper residue from the suppressor attachment area and adapter using a standard gun cleaning solvent. If alternating between different adapter types (for example, switching between a muzzle brake and a flash hider), clean the back section prior to re-attachment.

For armorer-level deep cleaning, SureFire's procedure calls for soaking the suppressor muzzle-down in CLR cleaner for 24 hours (do not submerge the lock ring — CLR will discolor the IonBond coating), then rinsing with water, brushing attachment areas, rinsing again, and firing 5-10 live rounds to expel loosened carbon. This process may be repeated annually or every 10,000 rounds.

The lock ring uses a permanent dry lubricant — no additional lubrication is required, though any weapons-grade oil may be used to facilitate smooth rotation.

What's in the Box

• SureFire SOCOM556-RC2 suppressor
• Carrying pouch
• Cleaning brush
• User manual

Specifications

SureFire builds to military specification. Here's exactly what you're getting.

• Caliber: 5.56 NATO
• Minimum Barrel Length: 10 inches
• Length: 6.4"
• Diameter: 1.5"
• Weight: 17 oz
• Materials: Inconel 718 and stainless steel
• Finish: High-temp Cerakote
• Mount System: SureFire Fast-Attach (compatible with SureFire WARCOMPs, SOCOM flash hiders, and SOCOM muzzle brakes)
• Full-Auto Rated: Yes
• Firing Schedule: 90-round sustained limit; allow cooling before resuming
• Color Options: Black, Dark Earth (FDE)
• SOCOM Certification: Selected for U.S. Special Operations Command use
• Warranty: Lifetime Warranty (original owner)