Initially designed for elite HRT unit’s, Griffin Armament’s HRT-556™ model is the shortest addition to the DUAL-LOK® family of suppressors. The latest version HRT-556™ G2 Suppressor features an improved low-profile flash hider endcap that works in conjunction with the ECO-FLOW™ baffle stack to reduce gas backpressure and improve cyclic performance of the host firearm. Other notable improvements incorporated into the HRT-556™ G2 include an improved, lower backpressure ECO-FLOW™ baffle stack, and a thicker blast baffle to increase durability vastly over the already incredibly robust G1 HRT-556™.
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.
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
Available in Black or FDE Cerakote Finish
Perpetual™ Lifetime Warranty
The DUAL-LOK® HRT-556™ suppressor is rated up to .22-250 REM.
DUAL-LOK® HRT-556™ (.22 cal) suppressor
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!
INTRODUCING THE DUAL-LOK™ HRT-556™ SUPPRESSOR Initially desig...
In this video we cover the DUAL-LOK™ HRT-556™ from Griffin Arm...
Griffin Armament puts the Dead Air SIERRA-5 up against the Gri...
I use this can for my 11.5 SBR night set up. Performs well when shooting under night vision and excels at signature reduction. As for the dual lok system I was pleasantly surprised by it. I have yet to have any carbon lock issues and it holds sturdy banging it on barricades. Definitely recommend if you are looking for something that is great at signature reduction especially if using NODs.
This suppressor was my first one because I'm not a big fan of the government telling me what I can and can't have but I finally decided to pick one up and wait the 9 months and you know what? I F'ing love this thing! I am a griffin fan for life. Thank you Austin and the rest of the guys down there you guys keep the government tyranny to a minimum and I love it!.
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.
