Initially designed for elite HRT unit’s, Griffin Armament’s HRT-556™ model is the shortest addition to the DUAL-LOK™ family of suppressors which has to this point not been available to the general public.  Griffin utilized the new DUAL-LOK™ active retention system with this suppressor, an often time demanded feature by government customers.  This combined with generations of R&D brought a compact, highly durable, low flash, and top performing suppressor to market for government customers.  Griffin is now releasing it to the commercial market. 

The HRT-556™ features the patent pending DUAL-LOK™ mounting system, an accurate, robust, reliable, and wear free system with robust muzzle device support.  The suppressor itself was designed to have minimal flash signature, despite its size, minimal weight, minimal POI shift, minimal gas blow back, maximum strength, durability, and sound performance.  This was a tough list of performance attributes to tackle, but Griffin succeeded by bringing unbeatable sound suppression and flash reduction to this compact suppressor. 

Baffle technology is carried over and tuned from the 4th generation Recce Suppressors, borrowing the ECO-FLOW™ patented feature that greatly increases performance. ECO-FLOW™ baffles reduce back-pressure, increasing flow, thus making the suppressor host firearm operating system more reliable and unaffected by the suppressor and providing cleaner breathing air to the operator’s face.  The patented low profile flash suppressing end cap further adds performance to the low flash baffle system. 

“I spent several months very focused on this project with our production managers and technicians making small changes to the baffle system, cutting the prototype parts, welding prototypes, then testing through our B&K pulse system, and repeating this cycle over and over and over.  I wanted the absolute best sound and flash performance in the smallest size possible.  Our team achieved it. I have never made so many prototypes for one series in the last 17 years as I did with the DUAL-LOK™ cans. Bringing together sound and flash performance, while retaining accuracy and durability in a package this small; we haven’t done it before. This little can has some of the best flash performance of any in our line, regardless of its size.  I’m really proud of what our team did here.”

– Austin, Lead Design Engineer, Griffin Armament

DUAL-LOK™ suppressors are machined in Griffin’s Watertown Wisconsin facility by freedom loving Americans.  

This suppressor is NOT compatible with the DUAL-LOK™ Stealth Flash Suppressor (2.75") or the DUAL-LOK™ Bayonet Flash Hider. 

MOUNTING OPTIONS AVAILABLE :

DUAL-LOK™ Minimalist Brake 5.56mm included

DUAL-LOK™ Minimalist Brake Titanium (6AL4V) 

DUAL-LOK™ Minimalist Stealth Flash Suppressor

DUAL-LOK™ Bayonet Micro Brake

DUAL-LOK™ 2 Port Paladin Brake

DUAL-LOK™ Tactical Compensator

• DUAL-LOK™ Stealth Flash Suppressor (2.25")

MAINTENANCE ITEMS ARE AVAILABLE :

DUAL-LOK™ Wrench

Griffin GI Armorers Wrench

Mount Adapter Driver

Cleaning Brushes

ST-3 Thread Sealant

High Temp 2300 degree Anti Seize

Alignment Rods (to verify proper installation)

WHAT'S IN THE BOX?

DUAL-LOK™ HRT-556™ (.22 cal) suppressor

DUAL-LOK™ Minimalist Brake 1/2x28 5.56mm (.22 cal) included

Branded Griffin pouch

DUAL-LOK™ HRT 556™ Manual

CALIBER RATING :

The DUAL-LOK™ HRT-556™ suppressor is rated up to .22-250 REM.

DUAL-LOK™ HRT-556™ suppressors do not have minimum barrel length restrictions or constraints for rifle calibers. While longer barrels promote longer service life, there are no barrel length restrictions with this suppressor! 

SPECS :

FEATURES : 

Utility patents pending 

Wear free mounting system, requires no consumable parts

Taper lock interface ensures security and accuracy

ACME thread provides speed of attachment

Locking ring incorporates 3 anti-rotation teeth to eliminate inadvertent loosening

120 effective positions ensure a rock-solid suppressor mount and provide extremely low POI shift 

17-4 stainless steel & 718 Inconel

Traditional Tube Design with internal flash hiding characteristics

Patent pending ECO-FLOW™ baffle system for reduced blow back

Patented flash reducing end cap

DUAL-LOK™ Minimalist Brake 1/2x28 5.56mm (.22 cal) Included

¾” wrench flats on muzzle devices 

Collar Nitrided for increased surface hardness, corrosion, and wear resistance

Suppressor body H900 heat treated and Cerakoted 

Available in black or FDE

Perpetual™ Lifetime Warranty