Griffin Armament Optimus Modular Silencer

I got a chance to play with the relatively new Griffin Armament Optimus silencer. It is modular so it can suppress .300 win mag all the way down to .22lr. Here is a list of acceptable calibers you can suppress with the Optimus

  1. .300 Win Mag
  2. .308 Win
  3. .300 BLK
  4. 5.56x45mm/.223
  5. 9mm
  6. .22lr

Now there are some calibers that fall in between like .30-06 and 7.62×39 however I did not have those to test out but I am pretty sure you could suppress those as well.

The one issue I had with the Optimus silencer was learning how to assemble it. The one I got was a demo unit from Silencer Shop and there wasn’t any instructions on how it is supposed to be configured. Having very little experience cans other than my SilencerCo SpectreII, this can was daunting with the number of parts. I tried looking at the owner’s manual on Griffin Armament’s website but that was not much help either. Here is a link to the pdf file.

This is what I got from Silencer Shop when I asked them about it.

The Optimus silencer must be configured for use. The main tube body features a baffle bore on one end and a booster housing bore / taper lok baffle bore on the other.

In all configurations, the five baffles must be keyed together and inserted into the baffle bore of the tube. The taper lock ring is then installed and tightened with the booster piston used as a wrench. An allen key or other rod like tool [such as a USGI 5.56mm cleaning rod segment] should be inserted through the vents in the booster piston to allow the piston to be used with greater torque. The desired front cap should then be installed on top of the lock ring and tightly torqued as well using the same booster piston tool.

From this point the various configurations are integrated as follows:

1: DIRECT THREAD: Install internal booster piston housing using CAR stock wrench, remove piston retainer/piston & spring, replace retainer with direct thread adaptor. This configuration is suitable for use up to 300BLK subsonic, and also rimfire through FN 5.7mm use. Alternately the piston spring could be replaced with the revolution series fixed barrel spacer- but the 6061 spacer is only suitable for 9mm, 300BLK subsonic, and rimfire use.

2: PISTOL: Install internal booster piston housing assembly using CAR stock wrench. This configuration is suitable for use up to 300BLK subsonic, and also rimfire use.

3: SMG / 3-LUG: Install internal booster piston housing using CAR stock wrench, remove piston retainer/piston & spring, replace retainer with 3 Lug rear cap, bushing, and spring. This configuration is suitable for use from rimfire up to 300BLK supersonic on 12” barrels, and 5.56mm semi auto on 14.5” or longer barrels. A strap wrench may be required to remove the 3 lug retainer/ rear cap- a tool is in production.

4: Taper mount full size (included) and Taper mount Midsize (not included) : Drop in Taper Lok baffle with top porting slot on the same side as the 9mm baffles below, give 1/6 turn counter clockwise (to allow taper extension to bring baffle into correct orientation during tightening). Install taper mount extension desired, and tighten using as much force as your two hands can input. The full size config is rated for use up to 24” barrel .300 Win Mag. The mid size is rated for to a maximum pressure application being 16” barrel .308, or 10.5” 5.56mm. To disassemble remove extension and use rod to tap out taper lok baffle.

5: A2 MOUNT (Not included): Drop in Taper Lok baffle with top porting slot on the same side as the 9mm baffles below, give 1/6 turn counter clockwise (to allow taper extension to bring baffle into correct orientation during tightening). Install A2 mount extension, and tighten using CAR stock wrench. To install, remove collar, insert A2 through collar, allowing rear surface to slide into rear A2 groove, slide suppressor over A2, thread collar onto silencer, positioning collar side aperture to 6-oclock to reduce gas blow back characteristics. A2 mount is compatible with A2, BCM Mod 0, Griffin M4SD series: flash comp, single port brake, hammer comp, tactical comp, and 30SD series flash comp. To disassemble remove extension and use rod to tap out taper lock baffle.


Ok that sort of helps. But my ignorance of the parts’ proper names was a big issue. I did not know what parts these instructions were referring to. After a little bit of time and a process of trial and error I was able to figure out the Optimus silencer.

This image from Silencer Shop helped a lot.


I made this video to help others. If I was confused I am sure there might be others.


I did shoot the Optimus with my friend Brian on a bunch of guns. We used a threaded barrel from S3F Solutions as well as the Lone Wolf Alpha Barrel on my Glock 22 and regular Lone Wolf threaded 40-9 barrel on my Glock 35. I tested the Optimus Trilug adapter on a Zenith Firearms Z5RS and it worked but the inner diameter of the trilug was a hair narrower. So when I shot the Z5RS supressed, the trilug would get stuck on the tip of the thread protector on the Z5RS. I ended up removing the thread protector to make it easier for removing the Optimus from the Z5RS.

The Optimus was not the quietest suppressor that we had shot but its ability to shoot so many different calibers is its obvious selling point. We compared it to a Coastal Gun MIMS suppressor. The MIMS can is gigantic compared to the Optimus and a lot quieter when shooting the same round out of both suppressors. However the MIMS can is only rated for pistol calibers and sub sonic .300blk. I shot the Optimus on my .308 SCAR17 and AR15 in 5.56.


In .308 it was really not bad without hearing protection. Also I was shooting ZQi 145gr NATO ammo. However shooting my AR15 with 55gr 5.56 was the absolute loudest of all the guns we fired. The problem is I did not have the Taper Mount for 1/2×28 to thread onto my AR. The Optimus has two major configurations. A pistol length version and longer rifle length version. The longer length is achieved with an extra baffle inserted into the rear of the can and a rifle extension tube screwed onto the back of the suppressor body. That extension tube can only interface with Griffin Armament’s minimalist taper mount brake.

So I had to shoot the AR with the short pistol configuration and while it was hearing safe it was extremely uncomfortable without hearing protection.

I went to see my friend Scott and we put the Optimus on his select fire MP5. I also ran an action match with the Z5RS suppressed by the Optimus.

Would I buy the Optimus? I think so if I was on a limited budget and wanted hearing safe suppression for a multitude of guns and calibers. The Optimus is like a Swiss Army Knife. It is a multitool. It can do a lot of different things but it is not as good as using the proper tool for the job required.  It won’t be the quietest suppressor out there but it can work with so many calibers. Now I need to try a SilencerCo Hybrid and see how that compares.

MSRP: $1095


Nicholas C

Co-Founder of KRISSTALK forums, an owner’s support group and all things KRISS Vector related. Nick found his passion through competitive shooting while living in NY. He participates in USPSA and 3Gun. He loves all things that shoots and flashlights. Really really bright flashlights.

Any questions please email him at


  • 12judges

    Good review. Now that these multi-cals are really taking off though I have some advice. I got into suppressors long before the fad (roundabouts 07′ – 08′) and there is one universal truth I have found about longevity – you can work down but not up. What I mean is you really should segregate pistol and rifle caliber suppression (I put rimfire in the pistol category…you can shoot it through your rifle cans, but as dirty as it is too much can eventually lead to problems) in different cans.

    Rifle muzzle blast and heat, even with very moderate firing rates is incredibly stressful on the interior surfaces of these devices already, and that’s without the threads and specialized parts seen in the can being reviewed here. you might be able to suppress .300 win mag out of this can as designed, but for how long and under what shooting regimen with all calibers…?

    I have already seen one friend destroy their “subsonic” rated pistol can using .300AAC and another that had a baffle strike because he was using his surefire FA556 on his .22 caliber pistol.

    I own at least 7 suppressors of various types/calibers and some that are multi-cal, but only within either the “rifle” or the “pistol” category, and rimfire only ever in something that can be taken apart for cleaning. If this is something you’re looking at using and keeping for 10 years or more (and I think that’s most of us…) with regular use that is definitely sound wisdom.

    • JumpIf NotZero

      Absolutely. Dedicated cans all the way if you can!

      I really do get the “bu bu but I want to “save” money” but these all-in-one cans are a master of none. NFA is not a poor man’s game. There are about to be a whole bunch of disappointed Hybrid and Optimus owners out there.

      People think they’re just going to swap cans around at the range… These people have not fired 20 rounds of 556 and had to wait 20-30 minutes for the can to cool enough to handle it.

      I will say this… These do-it-all cans are EXCELLENT for the profit margins at silencer manufacturers. You pay more for accessories and get less, that works really well for them.

      • Nicholas C

        That is what the oven mitts are for. LOL

        • JumpIf NotZero

          Ok, now I going to need to see a video of you changing from full rifle to short pistol with oven mitts 🙂

          • Budogunner

            I admit, I keep an ov-glove on my range bag. I usually start by pouring water over a hot can if I have to. Not really something you can do at indoor ranges, though.

          • Suppressed

            Bro, I know NOTHING about cans, but I know LOTS about cars. And I avoid spraying hot car parts with water because of the warping it can cause. I only mention this as a caution because I’d hate to see you warp your can and then get a baffle strike or something as a result.

          • Budogunner

            Much obliged. No harm yet, but ‘yet’ isn’t a fun word when it comes to safety.

            What about the use of ablative media? Many manufactures approve of that, though it won’t coast the inside of the can evenly. It’s this a different situation because it is present as the can heats up? What about reapplication once the can has gotten got?

          • Suppressed

            Did your phone autocorrect abrasive to ablative or did you mean the latter? If it is the latter, I’m not familiar with the concept and Google just seems to talk about it in regards to lasers, so I’m even more lost.

          • Budogunner

            No worries, “ablative medium” is the fancy, industry term for a coolant you put in the silencer before shooting through it. This can be lithium greese, expensive name brand stuff, or good old H20. This is usually only done with pistol calibers and modern silencers have become so efficient the practice isn’t discussed much anymore.

            My SWR HEMS II was designed to be shot wet. It won’t get .45ACP “hearing safe” shot dry. That is old hardware, though, and it now mostly lives on my 9mm AR upper as the larger bore eliminates had in the face. Not super quiet, but it definitely helps.

          • Suppressed

            Ok, gotcha. Thanks for the explanation. Anyway, I wouldn’t have any concerns with it being used the way you’re describing it, because the liquid cooling medium would be heated/cooled at the same rate as the silencer itself, much like the coolant in a car’s radiator cooling system. It’s just the shock-cooling of hot parts with liquids that causes warping/cracking. Most common/applicable example would be somebody beating the hell out of their car’s brakes and then spraying the wheels (and thereby the brake rotors) down to wash them. Then the next time they drive the car the steering wheel is dancing out of their hands everytime they brake because they warped the rotors.

    • NDS

      Shooting 22LR out of a sealed Surefire rifle can… Makes my face hurt

  • USMC03Vet

    It’s like Lego but in suppressor form. I think I can do this.

    • Amanofdragons


  • Ed

    No .45 auto……. Rip off!

    • Nicholas C

      Yeah sadly the Optimus can not do .40 or larger.

    • JumpIf NotZero

      You don’t want a 30cal rifle can with a .47 bore. This is the one decision that Griffin made that’s better than the SiCo Hybrid.

      • Nicks87

        Jump, are there any .45 cans that you could run on a .308 and still have a decent amount of noise suppression?

        • JumpIf NotZero

          Not in my opinion! The most popular products just have pretty big differences between where the volume is distributed and obvious materials used.

          Look at how this Griffin can “adds” the blast chamber for the rifle config. That’s fairly clever if that’s the goal, to have an ultra modular can, but the question becomes why….

          If EVERY serious mfg on the market makes a fully welded rifle can – how has Griffin come in and made a modular magnum can that I am to beleive is the same strength? I think the answer is obvious.

          So then you have the Hybrid which can do 30rifle and 45pistol… But at a cost for the mounts that rivals just buying 30rifle and 45pistol cans separately.

          I like SiCo, and if you’re into big bore (45-70, long colt, 44mag) then the Hybrid seems great – for people just trying to save money, I think a lot of new Hybrid owners are going to be dissapointed. But what a great money maker modular cans are!

      • Dan

        sure you do. bore diameter matters less than baffle design and total internal volume.

        people think you can’t get good suppression without a tight bore. it’s not true.

  • TheNotoriousIUD

    Sweet video, looks fun.
    I love shooting out in the snow.

  • thedonn007

    Would you buy this if you already had a .22lr, 9mm, and .30 can?

    • Nicholas C

      Hmm probably not. Unless you want to swap this suppressor onto a lot of different guns.

      • JumpIf NotZero

        Yea, but that’s practically unlikely considering the costs, heat, handling, and time it takes. People who have fantasies about swapping mounts, baffles, adapters, endcaps will quickly come to the truth that it sucks.

        • Nicholas C

          Depends on the person. People love guns that shoot corrosive ammo. Like black powder guns. But they are easier more cost effective options. And yet they still like them.

        • Budogunner

          You may have multiple hosts but plan on adoring different guns on different days. Designs line this one make that an option, which is nice.

  • Treyh007

    I really like how manufactures are coming out with “one size fits all” suppressors! I understand these might be as good as dedicated ones as far as sound goes but it’s truly a plus for the budget minded consumer. ???? I’m a huge fan of Griffin Arms products by the way.

  • NDS

    The Optimus in full length config on a 14.5″ 5.56 is VERY quiet (for a 5.56), although a 9+ inch can on a 5.56 carbine may be excessive for some.

    I used a standard Griffin taper mount brake for the mount on that client’s rifle, you only need to use the minimalist brake if you use the minimalist blast chamber (not included lol)

  • Cymond

    I’d like to see a comparison of these multi-caliber suppressors. I’m especially interested in the Liberty Mystic-X and Cosmic. I heard a rumor that the SilencerCo Hybrid doesn’t perform very well, but am still excited for the inevitable comparison tests.

    Here’s a list of the Mystic-X calibers
    17 M2 (RIMFIRE), 17 HMR (RIMFIRE), 17 WSM (RIMFIRE), 22 SHORT (RIMFIRE), 22 LONG (FULL AUTO), 22 LONG RIFLE (RIMFIRE), 22 MAGNUM (RIMFIRE), 22 Hornet, 22 K Hornet, 218 Bee, 219 Zipper, 221 FIREBALL, 223 REM (See Note Below), 22 PPC (See Note Below), 30 PPC (See Note Below), 30 Carbine, 30 Herrett, 30 Mauser, 30 – 30 Winchester, 32-20, 32 S&W Long, 32 H&R Magnum, 4.6 X 30 HK (FULL AUTO), 5.56MM NATO, 5.7 X 28 FN (FULL AUTO), 6MM PPC (See Note Below)
    6MM BR (See Note Below), 7-30 Waters, 9 X 18 (FULL AUTO), 9 X 19 (Base Caliber) (FULL AUTO), 9 X 21, 9 X 23 (38 Super), 9 X 23 Winchester, 9 X 25 Dillon, 9 X 25 Super Auto G, 300 BLACKOUT SUBSONIC 8” BARREL (FULL AUTO), 300 BLACKOUT SUPERSONIC. 8” BARREL, 380 (FULL AUTO), 38 Special, 38 S&W, 357 SIG, 357 MAGNUM, 357 MAXIMIUM, 357 Auto MAG, 357 Herrett, 338 Spectre, 300/221 FIREBALL, 300 Whisper©, 5.45x39MM Russian, 6.5 Grendel (See Note Below), 6.8 SPC (See Note Below), 7.62 xX25 MM (FULL AUTO), 7,62 X 38 R, 7.62 X 39 MM

    Note: All rifle calibers with chamber pressures exceeding 45,000PSI that are on the caliber list, are restricted to 16″ barrels or longer. (6.8SPC, 5.56 NATO, and the like FROM THE CALIBER LIST ONLY)

    The Liberty Cosmic adds these calibers to the list.
    454 Casull, 45 Long Colt, 45 ACP, 45 GAP, 44 Remington MAG, 44 Special, 41 Remington MAG, 41 Action Express, 40 S&W 10mm Magnum, 10mm Auto, 400 corbon

    • JumpIf NotZero

      Omg! 7-30 Waters! What an amazingly relavent list that isn’t padded with fluff at all.

      • Cymond

        Oh yeah, it’s totally padded, but I decided to copy-paste the list instead of imposing my opinions of which ones are relevant. However, it should be noted that the Mystic-X is designed for .357 and under, so if comparing to the Hybrid, it would be fair to use the Cosmic.

        Regardless of the padded caliber lists, I still look forward to some comparisons.

  • Sianmink

    Still waiting on my order confirmation so I can file the paperwork. q.q

  • hking

    The NFA rules are just silly. For the longest time in the Form 1 can world, the ATF has said that having spare endcaps and spare baffles constituted having a unlicensed suppressor. I guess these companies submit the entire kit as the suppressor, so theoretically should I be able to make my own form 1 “kit that uses one tube, multiple end caps and baffles that can be removed and rearranged?

    • John

      HA! I was wondering the same thing….. Under ATF rules/logic that looks like a whose set of suppressors!

  • Dan

    sadly no .45

  • dedeye

    Great video but what was that multifunction tool used for assembly/disassembly?