DUAL-LOK™ 7 Suppressor 7.62mm (.30cal)

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Griffin Armament has been satisfying customers for nearly two decades with cutting edge sound suppressors.  Suppressors offering active retention systems are often times demanded by government customers and Griffin has spent considerable research and development efforts to engineer and manufacture a next generation system in this category.  A quality mounting system should be accurate, robust, reliable, require minimal training, and be free of wear prone metal on metal teeth or ratchets, thereby guaranteeing a longer trouble-free service life with minimal maintenance needed. Griffin’s patent pending DUAL-LOK™ mounting system, the subject of one of 6 pending patents related to the series, was designed around these objectives.  The suppressor itself should have minimal flash signature, weight, POI shift, and gas blow back, as well as maximum strength, durability, and sound performance.  These were the company internal performance categories that were scrutinized and met during the development.

Griffin Armament was the US pioneer of tubeless suppressor technology when in 2010 nearly the whole Griffin centerfire suppressor line was engineered this way.  If lower system weights are desired, tubeless construction is ideal, as traditional double walled construction is omitted.  Deleting the outer tube saves weight but also imposes other engineering difficulties which need to be overcome.  However, with over a decade of tubeless suppressor manufacturing experience, Griffin has matched or exceeded the durability and useful service life of traditionally constructed suppressors.  DUAL-LOK™ suppressors are manufactured of 718 inconel and 17-4 stainless steel, from industry leading suppliers.  Griffin utilizes cutting edge CAD design, industry leading tooling and machining practices, and integration of laser welding to provide ideal construction to the tubeless DUAL-LOK™ suppressors.

Internal flow and balancing of optimized sound suppression is also a fundamental study in suppressor engineering, as that is the chief reason to use the items.  Griffin has integrated it’s patented ECO-FLOW™ baffle design into these suppressors. This design provides optimal flash reduction, and flow, which reduces blow back in semi automatic and full automatic operating systems.  This provides the end user with reduced sound pressure and gas at the shooters ear and face, a more enjoyable shooting experience.  The patent pending flash hiding end cap features high performance internal and external flash reducing features as well as optimally tuned gas vents which not only enhance flash reduction even further but also increases sound performance to ECO-FLOW™ baffles.

The DUAL-LOK™ mounting system is machined into the suppressor body, for maximum accuracy and durability. It features a precision taper interface (one locking feature) between the mount and the device ensuring accuracy and repeatable POI shift.  An ACME thread, provides speed and ease of attachment.  A robust wave spring provides a reliable and positive heat resistant spring action to the redundant locking collar (second locking feature).  The locking collar is semi permanently installed to the mount via factory pressed stainless steel splined taper pins.  Since the mount has no wear prone metal on metal sliding actions like many other mounts, there is no need for the operator to disassemble the system.  This locking ring includes three anti-rotation teeth (or splines) which ensure the suppressor will not come off inadvertently.  The muzzle device integrates 60 machined anti-rotation grooves which is doubled by the collar’s two locking positions. How is this achieved? The collar’s two locking positions are machined out of phase of one another by 3 degrees which provides the system with 120 different locations to lock and ensures that when the suppressor is firmly screwed onto the taper a locking spline will be at an ideal location to ensure a rigid and locked suppressor.  When the suppressor is firmly attached, only one of the two lock positions will work, allowing the spring to push the locking collar rearward over the splines.  Every time the operator attaches the suppressor, they will articulate the collar to this same locking position.

Substantial efforts are taken in the manufacturing and inspection of the DUAL-LOK™ products to ensure Griffin customers are outfitted with some of the best suppressor systems in the world.

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

DUAL-LOK™ Manual





The DUAL-LOK™ 7.62mm suppressor is rated up to 300 PRC.

DUAL-LOK™ 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!




Overall Length:


Length Added:

5.6" when using included Minimalist Brake, 4.6" when using longer devices


12.6 Ounces


High strength, high temperature, corrosion resistant 17-4PH Stainless Steel


DUAL-LOK™ Mounts

DB Rating:

 (139DB) 16” 308win AR10, (125DB) 9.5” 300BLK SUB, (136DB) 11.5" 5.56mm Griffin MK1


High Temp Cerakote

Full Auto Rated:



  • 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

  • Laser welded tubeless design

  • Patent pending flash reducing and flow optimized end cap

  • DUAL-LOK™ Minimalist Brake 5/8x24 7.62mm (.30 cal) Included

  • ¾” wrench flats on muzzle devices

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

  • Suppressor body H900 heat treated and Cerakoted

  • Perpetual™ Lifetime Warranty

1.50 (in)
6.00 (in)
1.50 (in)
.30 (7.62mm)
Attachment System:
User Serviceable?:

2 Reviews

  • 5
    Dual-Lok 7

    Published by Cooke on 10th Oct 2023

    Bought the DL-7 and HRT during their release month and choose them after months and months of research. DA rubbed me the wrong way and wasn't impressed by their Sandman K with Ebrake with subs nor the nomad on 5.56. ratchet mouth can fail and have friends with them who's mount failed. My agency runs Omega 300 and their a solid can, mid at everything but ASR mount wears fast and wasn't blown away by 300blk. Was sold on GA after seeing the mount and heard a Reece 5 on a SBR... Currently running the DL7 on a LWRC 10.5 300blk SBR and it's fantastic. No gas to the face, minimal flash (only say this cause HRT is literally 0) and sounds pretty dang good. Mount is rock freaking solid and doesn't move. From first round to 300th, no movement. Amazing. Shot 208gr Hornady 300 BLK and can shoot all night at hogs without ear pro. At 25 yards away, using a single pane glass door, the round in nearly undetectable. At 50 yards, you'd have no idea someone shot. Was able to shot strings of 10 rounds of supers without ear pro without a problem. At about 100 yards with the same test behind the front porch door, the supers were pretty much impossible to distinguish. Lastly, tried it on my LE carbine for plain clothes, a LWRC PSD 8.5" 5.56 and that thing rattles your teeth when wearing double ears. Could shoot 2/3 rounds without ear pro but wasn't the most comfortable, not painful but sharp, flash was more noticable but still very good. On a 11.5 it was very nice. Highly recommend this or the HRT 762 for 30 cal needs.

  • 4
    Nice can

    Published by Chris Weinkel on 21st Sep 2022

    Not sure if its worth the money. Super nice can but pretty expensive. I bought it for my first can the other ones at the dealer didnt have the fit and finish of this one. Not a big suppressor guy so we'll see how it goes. Initial read on it was solid.