The Griffin Armament DUAL-LOK HRT is a black 5.56mm suppressor built on Griffin’s DUAL-LOK mounting system (Griffin part no. GADLHRT5W). Griffin builds the tube and most of the baffles from H900 heat-treated 17-4 stainless steel and adds 718 Inconel where the heat is worst. Its ECO-FLOW baffle system and low-profile flash-reducing end cap are tuned to keep gas and flash down on a semi-auto rifle. A DUAL-LOK Minimalist Brake in 1/2×28 comes with it, so a threaded AR-15 barrel is ready to take the can. For an AR owner who wants a compact, hard-use can with a positive mount, it is a serious option.

Key Specifications

• The caliber is .22 cal (5.56mm), built around the AR-15 platform.
• Diameter is 1.5 inches, a typical size for a 5.56mm rifle can.
• The materials are 17-4 H900 stainless steel and 718 Inconel, alloys chosen for heat and long service life.
• The mount is DUAL-LOK, a wear-free locking system with no consumable parts.
• A DUAL-LOK Minimalist Brake in 1/2×28 is included, matching the standard 5.56 muzzle thread.
• The baffles are ECO-FLOW, Griffin’s patent-pending design for lower back pressure.
• The finish is black Cerakote, a hard coating suited to a hard-use can.

Frequently Asked Questions

How does the DUAL-LOK mount work? It locks the suppressor onto a DUAL-LOK muzzle device without consumable or wear-prone parts, and the included Minimalist Brake threads onto a 1/2×28 barrel.

Are there barrel length restrictions? No. Griffin states there are no barrel length restrictions for its DUAL-LOK HRT suppressors.

Do I need ATF approval to buy this? No. As of October 9, 2026, ATF no longer requires Form 4 approval, registration or a tax stamp for suppressors. It transfers on a Form 4473 with a background check through a Class 3 (SOT) dealer. State and local laws still apply.

Buy the Griffin Armament DUAL-LOK HRT Suppressor, 5.56mm, Black

As of October 9, 2026, this suppressor transfers on a Form 4473 with a background check at your Class 3 (SOT) dealer, with no Form 4 or tax stamp; state and local laws still apply. Order through Griffin Armament‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will handle the transfer, and it ships fast to your Class 3 dealer.