CMMG 11DB032 Zeroed 556K 5.56mm Black Stainless Steel

The CMMG Zeroed 556K is a 5.56mm direct-thread suppressor built for shooters who want genuine noise reduction without the premium price tag. Whether you're running a precision rifle at the range, hunting with a modern sporting rifle, or putting rounds downrange at speed, this suppressor tames the report and recoil impulse while staying compact enough to handle day-in, day-out use. CMMG manufactures every Zeroed suppressor in-house, which means tight quality control, consistent performance, and real affordability.

Built from heat-treated 17-4 stainless steel with a nitride finish, the Zeroed 556K is tough and corrosion-resistant. The tubeless, laser-welded baffle design keeps things simple and durable—no internal baffles to rattle loose. It comes rated for full-auto fire, so if you're cycling hot loads or running rapid strings, the suppressor can handle approximately 240 rounds between cooldown periods. Cleaning is straightforward: use nearly any solvent or ultrasonic cleaner without worry, and the welded front cap won't come apart on you.

Out of the box, you get two direct-thread mounts (1/2"-28 and 5/8"-24) that fit the most common rifle threading. If you prefer quick-detach systems, the suppressor body is threaded 1.375"-24 HUB-compatible, so you can run whatever QD mount and muzzle device combo suits your setup. Both direct-thread mounts feature 7/8" wrench flats, and the suppressor itself has a 3/8" square drive on the front cap—standard tools, no proprietary wrenches needed. At 6.5" long and 17.4 ounces with a mount (or 15.2 oz bare), it's a solid all-around profile that won't throw off your rifle's handling or balance.

Before you buy, confirm your rifle's thread pitch and barrel length requirements. The Zeroed 556K needs a 10.5" minimum barrel for 5.56mm use, and it accepts other calibers like .22 ARC, 4.6x30mm, and 5.7x28mm (which require a 5" minimum barrel). If your rifle needs a different mount than what's included, you'll order that separately.

Key Features

• Full-auto rated with 240-round cooldown cycles for high-volume shooting
• Heat-treated 17-4 stainless steel with nitride finish resists corrosion and wear
• Tubeless, laser-welded baffle design—no loose internals, easy to clean
• Two direct-thread mounts (1/2"-28 and 5/8"-24) included; 1.375"-24 HUB-compatible for QD options
• 3/8" square drive end cap and 7/8" wrench flats for tool-free disassembly
• Made entirely in-house by CMMG for quality control and value

Specifications

Frequently Asked Questions

What direct-thread mounts are included with the Zeroed 556K?

The suppressor ships with two direct-thread mounts: one 1/2"-28 and one 5/8"-24. These cover the most common rifle thread pitches. If your rifle has a different thread pitch, you'll need to purchase the appropriate mount separately.

Can I use this suppressor with a quick-detach mounting system?

Yes. The suppressor body is threaded 1.375"-24 HUB-compatible, so it will work with any compatible QD mount and muzzle device system you choose. You'll need to purchase the QD mount and muzzle device separately if you go that route.

What's the minimum barrel length for 5.56mm?

For 5.56mm/.223 use, you need at least a 10.5" barrel. If you're running 5.7x28mm, the minimum is 5".

Is the Zeroed 556K rated for rapid fire or full-auto?

Yes, it's full-auto rated. It can handle approximately 240 rounds between cooldown periods, so if you're cycling hot loads or running rapid strings, the suppressor will perform reliably and safely.