Review: Innovative Arms Integrally Suppressed M&P15-22

This is probably the most fun suppressed gun I have had the pleasure to shoot. While integrally suppressed semiautomatic rifles in.22LR is nothing new, Innovative Arms’ take on it is different. Just like the Spike’s Tactical Brown Recluse and the H&K MP5SD, the Innovative Arms M&P15-22 barrel is vented to bleed off gas and drop the bullet velocity down to sub sonic levels. So you can throw just about any plinking ammo and it will be quiet.

The gun is just your ordinary S&W M&P 15-22. It has all the same controls as an AR-15 but it has some proprietary components like the magwell, magazine, upper, bolt and charging handle. You can not install a normal AR-15 upper on here. There is no buffer tube or buffer. This M&P 15-22 has the newer MLOK compatible handguard and it is so much better than the quad rail design that the M&P 15-22 first came out with. The handguard is narrower and lighter. It feels very comfortable to grasp.


The Innovative Arms suppressor only adds 4oz to the gun’s weight bringing it up to a mere 5.9 lbs. The baffle is a monocore design and while this gun did not come with the take down tool, any regular 3/8″ socket wrench can be used to remove the baffle stack for cleaning.


It is a little dirty and wet because I previously ran some water in the can to see if it made a difference.


Of course I had to compare it to my M&P 15-22 with Spectre II.

4 5

The two guns are very different. I have modified mine somewhat. The aluminum free float rail is heavy compared to the short polymer handguard. But the biggest difference is the trigger. I have a Geissele SD3G trigger in my M&P 15-22 which makes it a dream to shoot.

Shooting my M&P15-22 with Winchester M-22 Subsonic bullets are a smidgen quieter than the Innovative Arms M&P 15-22.

Here is a short video I shot comparing the two guns.


Even though my setup is quieter, it is longer and requires sub sonic ammo. I can throw any regular standard velocity or high velocity into the Innovative Arms M&P 15-22 and it is almost as quiet. That is very impressive.


Since these are basically the same gun with different barrels, I swapped the uppers.


I was able to get a couple bursts with the Slidefire stock using the Innovative Arms upper. But I will be honest I have not mastered the technique.

This M&P15-22 was provided by Silencer Shop. It retails for $1325. I reached out to Innovative Arms and you could send in your upper to have converted to their integrally suppressed design. It would be over $1000 for this modification. While that is a bit more than I was expecting, the results speak for themselves. Every person that has tried shooting this cant help but giggle and smile. It is a very very fun gun.

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


  • Budogunner

    Muzzle cans in .22 are damn efficient. I’ve never seen the purpose in having in integral .22 as you can’t swap platforms sure, in this case they ported the barrel to make a true integral, but have fun cleaning those ports. .22 is filthy.

    • RocketScientist

      Only realy advantage I can think of is overall length and balance. With an integral can you end up with little additional length, and most of the added weight is not hanging off the front of the gun. Additionally, if ported properly (not just a reflex can) makes standard supersonic rounds subsonic automatically, which can be beneficial.

    • iksnilol

      Ported barrel = true integral?

      Integral suppressor means only that the suppressor is a part of the gun. The barrel doesnt’ have to be ported for it to be a “true” integrally suppressed gun.

      • Budogunner

        I prefer to call those permanently attached suppressors as their design wasn’t ‘integrated’ info the firearm in any means beyond a muzzle can is.

        What I consider to be a ‘true’ integral involves ports in the barrel, associated changes to the action (roller lock ramp angle) and/our springs, and a blast chamber/baffle stack designed accordingly.

        • iksnilol

          That’s to be honest, pretty silly.

          A permanently attached suppressor is a part of the firearm, and that makes it integral.

          A muzzle can can be taken on and off easily. An integral can, really can’t. Unless you consider a blowtorch or hacksaw easy.

          You’re just romanticising an outdated design by further complicating terminology.

          • Budogunner

            I see your perspective and respect it, I just also see a need for difference in taxonomy.

  • Anonymoose

    How can .22LR have enough recoil to work a Slidefire stock? Also, I need one of these to rid the neighborhood of squirrels, rabbits, raccoons, and possums.

    • Nicholas C

      I’m not sure but go YouTube Slidefire MP15-22 and you will see it work.

      • AndyHasky

        22 plinkster talks about in detail in a video, he said it can work, but a lighter trigger helps alot.

  • Andy Hills

    I think you mean 5.9 lbs not oz

  • Harry’s Holsters

    A perfect gun to teach small kids to shoot if you rest it!

    • A bearded being from beyond ti

      Mah kids gets to use the Holland & Holland, that’s a real rifle.

      • Harry’s Holsters

        Lucky kids!

  • iksnilol

    Vented barrel for .22?

    Better to just use a 4 inch barrel, that way you dont’ have to deal with the ports leading up.

    NOTE: most ammo in .22 LR marked as “standard velocity” is at most altitudes subsonic. Thank heavens for CCI standard velocity isn’t an unusual saying in Norway.

  • Martin Grønsdal

    so – can you shoot 10 x 30 round mags without damaging the suppressor?

  • Road

    If the Hearing Protection Act passes, I’m all in.