CHECKMATE-HD™ Suppressor

Now: $460.00
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(5 reviews) Write a Review

Due to popularity of our beloved legacy product, the CHECKMATE-QD suppressor, we present to you the CHECKMATE-HD™ suppressor. This new CHECKMATE-HD™ is a 5.8 ounce 5.7x28 pistol rated rimfire suppressor and utilizes our patented ECO-FLOW™ baffle technology as well as our newly developed CARBON-GARD™ technology- the subject of a pending patent. The 5.8 ounce, 5.04" overall length suppressor features a 17- 4 heat treated ECO-FLOW™ baffle system, front cap, and integrated EZ-LOK™ QD mounting system. The tube is 7075-T6 billet machined and hardcoat anodized for maximum strength.
The CHECKMATE-HD™ is the new market leader in rimfire suppressors.The CARBON-GARD™ technology seals the entire baffle core with high temperature Silicone O-rings. This allows the suppressor to be more user maintenance friendly than any other rimfire suppressor on the market. After 2000 rounds are fired, the inside diameter of the tube and outside diameter of the core are still spotlessly clean for ease of disassembly without specialized tools other than a US quarter. Extensive workup was done to the baffle system resulting in a baffle system with zero first round pop and a market leading sound pressure level (SPL) on rifles and pistols.
The CHECKMATE-HD™ comes with your choice of mounting interface (EZ-LOK™, CAM-LOK®, or Direct Thread) and corresponding barrel adapter (EZ-LOK™ or CAM-LOK®) and is field ready out of the box. This suppressor very simple and straightforward for end users to understand and utilize. Unbeatable sound performance, unparalleled ease of maintenance and servicing, light weight, high strength, historically accurate CHECKMATE-QD mounting, and incredibly competitive pricing are the user benefits of the CHECKMATE-HD™ suppressor.


What's in the box?

  • CHECKMATE-HD™ suppressor
  • Mounting Interface (EZ-LOK™, CAM-LOK®, or Direct Thread)
  • Corresponding barrel adapter (N/A if Direct Thread is chosen)
  • Branded Griffin pouch
  • Manual


  • QD mounting interface and adapter included (CAM-LOK® or EZ-LOK™ only)
  • Taper locking QD interface ensures security and accuracy
  • Unique patent pending CARBON-GARD™ tech offers an unbeatable user maintenance experience
  • Premium 17-4 H900 heat treated stainless steel & 7075-T6 outer tube
  • Patented ECO-FLOW™ baffle system for reduced blow back and optimally tuned sound performance
  • Patented flash reducing tool-less end cap
  • PVD and hardcoat anodize provide increased surface hardness, corrosion, and wear resistance
  • Warrantied for life with Griffin’s Perpetual Lifetime Warranty

Additional Mounting Options:

CLICK HERE! For Replacement Checkmate-HD™ O-Ring Kit

Caliber & Barrel Length Restrictions:

The CHECKMATE-HD™ is rated up to 5.7x28. It is recommended to let the suppressor cool to ambient temperature after shooting 21 rounds of 5.7x28.




Overall Length:


Length Added:



5.8 Ounces


7075-T6 Aluminum & 17-4 Stainless Steel


EZ-LOK™, CAM-LOK™, and Direct Thread

DB Attenuation:

.22lr (115.4dB) Ruger 22/45 Lite .22lr (114.4 dB) S&W M&P 15-22 Sport 16"


PVD & Type III Hardcoat Anodized

Full Auto Rated:

Limited 5.7x28

1.50 (in)
6.00 (in)
1.50 (in)
Attachment System:
User Serviceable?:
.22 (5.56mm)

5 Reviews

  • 5
    Nice can, checkmate!

    Published by mike armocida on 26th Mar 2024

    I received my Checkmate on 11 March, only four days after my Form 4 was submitted. I have put 450 rounds of CCI SV through the can sitting on an M4-22 and a MkII FV SR. The Checkmate is exactly what it should be, quiet, easy to mount, remove, and easy to clean. The O-rings work!!! I did notice a very slight POI shift on both rifles. I have only been shooting at 25 yards, I had to dial 1/10 Mil up and the same to the right. This adjustment is consistent after taking the can on and off and swapping between rifles. I would buy the Checkmate again, no regrets, just rimfire fun, thanks GA!

  • 5
    Checkmate HD

    Published by Joe W. on 13th Feb 2024

    I don’t have any fancy sound metering equipment, so my 40 year old ears (that spent 4 years in the army and nearly the last two decades in various steel mills) will have to suffice. I notice zero first round pop with this can. I’ve run it on several hosts with the ez-lok torqued in the can as a quasi direct thread can until I buy a few more mounts, and it works fantastic on everything I’ve put it on. It really shines on my bolt action ruger, putting down really impressive and consistent groups. I shot it quite a bit on my first few outings, putting easily 500ish rounds each time. Cleaning is a breeze, no real tools required and the baffle stack pretty much just drops out. Slide off the o-rings and drop the baffles in a wet tumbler with some SS pins and you’re good pretty much done. You really can’t beat it.

  • 5
    Checkmate HD .22 l.r. Suppressor

    Published by Tom Demaree on 6th Feb 2024

    Took posession on Saturday 3rd Feb. Attached the EZ-LOK adapter with 22 ft. lbs. of torque to the threaded barrel of my Walther P22 and cinched the can to the adapter. Confirmed alignment and then fired 100 shots. What fun to use this can, it is an outstanding product! Talk about dazzle power showing it off at the range. (Fired 30 shots before the can started to warm up.) Cleaning afterward was a piece of cake. Reach into your pocket, pull out a quarter to unscrew the front cap. Then grab the can with your left hand and twist off the rear EZ-LOK interface. Seperated the baffles and use CLR cleaner and a toothbrush, rinsed with warm water and towel dried. Reassembled and good to go. GA really outdid themselves creating this can!

  • 5
    It's a little too early to tell.

    Published by Mike on 10th Jan 2024

    What I can say however is that Capitol Armory made it really easy to certify the Form 4. In case anyone is wondering, if you already have fingerprints in an eft, you can upload them to CA and have it submitted before the kit arrives. The EZ Lock adapter seems fine. Check back in another 5-9 months and hopefully I'll have the can.

  • 5
    Sounds great and easy to clean for a rimfire suppressor

    Published by F. Daniel on 3rd Dec 2023

    I purchased as an alternative to my DA Mask in hopes of it being easier to clean. Shooting both suppressors on a P322 and I cannot detect any discernible difference in sound. Simply sounds great. The Eco-Flow baffles appeared to work since the Checkmate HD has less smoke/blowback than the Mask. On the cleaning front, it was much easier than the Mask. The entire tube, threads, and the exterior of the baffles were spotless. The o-rings do indeed work. One thing to note that after 150 rounds of CCI Clean Subsonic that two or three of the Eco-Flow ports in baffles 1 through 3 had been closed over by carbon. I had to use a dental pick to push the carbon out of the holes. I’d imagine the Eco-Flow properties might lessen with heaving shooting as more baffle ports become closed with carbon buildup. I’ll be using my Checkmate as my primary 22 suppressor from now on.