LANTAC M-SPEC556S 5.56 Suppressor | 1/2×28 DT | 01-SUP-MSPEC556S

The LANTAC M-SPEC556S is a purpose-built suppressor for .223/5.56 caliber firearms, precision machined from 17-4 stainless steel in H900 condition for improved corrosion resistance and durability. It uses a tubeless baffle architecture with 360° full-penetration laser welding to minimize thermal stress and distortion. The unit ships with a 1/2-28 UNEF direct-thread hub that can be exchanged for standard 1.375×24 TPI mounts using a standard armorer’s wrench.

Typical uses include range training and precision/practical shooting where reducing muzzle report and managing recoil impulse are priorities. The M-SPEC556S is rated for sustained semi-auto use and is specified as full-auto rated with adequate cooling between magazines.

Product Specifications

• The manufacturer is LANTAC USA.
• The model is M-SPEC556S.
• The suppressor is designed for 223/5.56 caliber applications.
• The material is 17-4 Stainless Steel (H900) for enhanced corrosion resistance.
• The finish/color is listed as Black.
• The included mounting adapter is a 1/2-28 direct thread hub that fits UNEF 1/2-28 barrels.
• The overall length without mount is 6.0 inches.
• The unloaded weight without mount is 13.5 ounces.
• The suppressor uses a tubeless baffle design with 360° full-penetration laser welds to reduce thermal stress.
• The unit was tested to 130 dB in accordance with MIL-STD-1474E.
• The product is described as full-auto rated when proper cooling is observed between magazines.
• The manufacturer warranty covers manufacturing defects.
• The stated minimum barrel length guidance for use is 7.5 inches (.223/5.56) or 10.5 inches (6ARC) as noted by the manufacturer.
• The accessories include a 1/2×28 direct thread mount.
• The UPC is 614347641859.

The M-SPEC556S blends robust stainless construction and a welded tubeless baffle system to provide a durable, serviceable suppression option for shooters focused on reduced report and consistent performance during extended range sessions or competitive events. Its included 1/2-28 hub makes it compatible with common direct-thread setups while offering the option to switch to standard 1.375×24 mounts.