Integrally supressed M&P 15-22

[Blackstuff]

The part that caught my eye was this:

No need to buy subsonic ammo to be stealth quiet, our unique design gives you subsonic velocities with standard and high velocity ammunition.

Huh?

Possibly H and K style ?

Ie - barrel heavily ported along full length of suppressor in addition to the baffles ?

I know that normal 9mm run through a MP5SD tends to come out subsonic.

/\ /\ This

Don't see the attraction in a .22lr myself though, if you want something like that as mentioned just get your barrel chopped to 12" and add a reflex type moderator. I imagine those ported barrels are prone to accelerated corrosion.

I know someone has joked about suppressed .22's not being picked up by shot timers but it is a genuine problem depending on the timer and ballache for the RO

[safetyfirst]

Short barrel I’d guess, that might give low speeds even with HV