SOF 556K

SOF 556K SUPPRESSOR - FULL-AUTO RATED INCONEL AR-15 SILENCER

The SOF 556K is a compact, full-auto rated 5.56 NATO / .223 Rem suppressor built for AR-15s, short-barreled rifles, and select-fire hosts. It's made from Inconel (IN718) using 3D metallurgical additive construction, measures 5.20" long with a 1.60" diameter, and weighs 15 oz. SOF lists no minimum barrel length for the 556K and rates it for velocities up to 3,300 FPS.

SOF rates the 556K's durability at three 30-round magazines to heat threshold at a one-second cadence. It's finished with SOF's NANO G coating and mounts using the QD 1x16LH AI NANO muzzle device system. Part number: SOF_556_K_QD_IN.

CAPITOL ARMORY'S OPINION

SOF was founded by people who spent years dealing with the hazards most shooters never think about in close-quarters work: concussive overpressure, toxic gases, airborne lead, and long-term hearing damage. Their products are designed to reduce that toll on the law enforcement and military professionals who do the job every day.

SOF leans into military styling in its marketing, but the 556K isn't restricted to military or law enforcement buyers. If you run an AR-15 or short-barreled rifle for duty, tactical, or other hard use, it's built for you too. 

FEATURES

• Full-auto rated
• Caliber: 5.56 NATO / .223 Rem
• No minimum barrel length
• Maximum velocity: 3,300 FPS
• Durability: 3 x 30-round magazines to heat threshold (1-second cadence)
• Material: Inconel (IN718), 3D metallurgical additive construction
• Weight: 15 oz
• Length: 5.20"
• Diameter: 1.60"
• Coating: NANO G
• Mounting: QD 1x16LH AI NANO muzzle device
• Cleaning interval: 3,000 rounds
• Color: Black
• Part number: SOF_556_K_QD_IN

WHAT'S INCLUDED

• SOF 556K suppressor

COMPATIBILITY

• Compatible Muzzle Devices: AI NANO muzzle device (1x16LH)

BARREL RESTRICTIONS

• 5.56 NATO / .223 Rem: No minimum barrel length (unrestricted per SOF)