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Initially designed for elite HRT unit’s, Griffin Armament’s HRT-556™ model is the shortest addition to the DUAL-LOK® family of suppressors. Griffin utilized the new DUAL-LOK® locking mount system with this suppressor, an often 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 and civilian customers.
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, POI shift, and gas blow back, coupled with maximum strength, durability, and high sound signature reduction performance.
Baffle technology for this product is linked to a recent Griffin patent and aggressive 4 month R&D program, and a second high durability R&D program targeting reduction of cyclic rate increase, making the suppressor host firearm operating system more reliable and less affected by the suppressor, reducing the contamination of breathing air in the vicinity of the operator’s face compared to previous technology. The patented low profile flash suppressing end cap further adds performance to the low flash baffle system.
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.
DUAL-LOK® HRT-556™ (.22 cal) suppressor
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!
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Diameter: |
1.5" |
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Overall Length: |
6.3" |
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Length Added: |
4.9" when using included Minimalist Brake, 3.5" when using longer devices |
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Weight: |
16.5 Ounces |
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Materials: |
High strength, high temperature, corrosion resistant 17-4PH Stainless Steel & 718 Inconel |
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Attachment: |
DUAL-LOK® Mounts |
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DB Rating: |
(135.6db) 11.5" Griffin MK1, (134db) 16” Griffin MK1 |
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Finish: |
High Temp Cerakote |
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Full Auto Rated: |
Yes |
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
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
This suppressor is nothing short of amazing. The dual lok system is incredible and could not believe the small amount of back pressure. I have it on a 11.3 rifle and it’s flawless. When compared to my duty rifle that has a Surefire Socom REC2 the HRT out performs it in every way. This is a true operators suppressor.
Wow, all I can say is Ive shot it side by side with the DA Sierra, Sandman K and S and Omega 300. I think the HRT blowed them away. I have it on my LE carbine, a LWRC PSD 8.5" 5.56 which will rattle your teeth without a can. Was so much more tamed, could shoot 3 round strings without ear pro fine and comfortable shooting all day when just adding a fomaie ear plug. concussion was non existent and flash was non existent which is a major factor. Perfect 5.56 fighting can. Liked the can so much, I ordered the HRT 762 the week it was announced. Will buy more these HRT cans. Lastly, shot this same rifle with my Griffin Dual-Lok 7 and still preferred the HRT. The HRT was quieter and zero flash suppression which is perfect for my application as LE. HRT feels more durable like a Surefire Socom. The DL7 is a more versatile can and still sounds great but if I were to choose for a fighting carbine, HRT all day. No other can id buy on the market right now. Mount is perfection also
Love this thing. I got to shoot it at my dealer, its not out of ATF jail yet. Bought it after the first 5 rounds. It has way less blow back than my dead air can.
