Griffin Armament HRT-556 Dual-Lok Suppressor, 5.56, 1.50 in

Description

The Griffin Armament HRT-556 Dual-Lok suppressor is a compact, full-auto rated muzzle device designed for use with .223 Rem/5.56 NATO. It uses Griffin’s DUAL-LOK mounting system for a secure, repeatable attachment to 1/2×28 threaded barrels. The unit pairs a traditional tube design with high-temperature materials for sustained use and features a high-temp Cerakote finish. Intended for duty, training, and precision-oriented applications where a compact, durable suppressor is required.

Key Specifications

• Caliber is .223 REM/5.56 NATO.
• The diameter is 1.50 inches.
• The thread pattern is 1/2×28.
• The overall length is 5.9 inches.
• Length added is 4.5 inches when using the included Minimalist Brake and 3.5 inches when using longer devices.
• Materials are 17-4PH Stainless Steel & 718 Inconel.
• Attachment uses DUAL-LOK mounts.
• The finish is High Temp Cerakote.
• Full-auto rated: Yes.
• DB rating listed as (135.6db) 11.5 Griffin MK1; (134db) 16 Griffin MK1 in manufacturer specs.

The HRT-556 combines a rugged materials set and a wear-free mounting interface to deliver consistent alignment and minimal point-of-impact shift across repeated mounts. Its taper-lock interface and locking ring with anti-rotation teeth reduce the chance of loosening while the ECO-FLOW baffle system and patented flash-reducing end cap address blowback and muzzle signature in a compact package. This suppressor is suitable for those seeking a durable, repeatable accessory for training, duty, or precision shooting applications where a compact, robust design is preferred.

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