5.56MM · QD MOUNT
556K
556K is the compact answer for shooters who need suppression without turning a carbine into a pike. At 5.20″ overall and 15 oz, it adds signature reduction while keeping the rifle pointable in vehicles, doorways, and confined positions where a full-length can simply gets in the way.
Built in Inconel IN718 through 3D metallurgical additive manufacturing, the internal geometry is printed as a single continuous structure rather than stacked baffles. That construction is what allows an unrestricted minimum barrel length and a full-auto rating in a can this short, with a durability threshold of three 30-round magazines at a one-second cadence.
Mounting is handled by the QD 1x16LH AI Nano muzzle device, so the can indexes repeatably and comes off fast for cleaning. NANO G coating manages carbon buildup between the 3,000-round service intervals.
Short. Light. Unrestricted.
- Model
- 556K
- Caliber
- 5.56mm
- Weight
- 15 oz
- Overall Length
- 5.20"
- Diameter
- 1.60"
- Material
- Inconel (IN718)
- Material Technology
- 3D Metallurgical Additive
- Min Barrel Length
- Unrestricted
- Maximum Velocity
- 3300 FPS
- Weapon Category
- Assault Rifle
- Rate of Fire
- Full Auto
- Durability
- 3 x 30 round magazine to heat threshold (1 sec cadence)
- Coating
- NANO G
- Mounting
- QD 1x16LH AI Nano Muzzle Device
- Cleaning
- 3,000 rounds
- Warranty
- Limited lifetime on all manufacturing defects (see warranty for details)
Suppressors are NFA-regulated items. Purchase requires an approved ATF Form 4 and transfer through a licensed SOT dealer. Availability and transfer times vary by state.