Dead Air added the Wolf 9SD to their line up earlier this month. In short configuration the specs are very close to the SilencerCo Omega 9k with the bonus of an extra section when you want even more suppression.

Ideal for subguns but also works as a nice short can on pistols - the increased diameter does block the pistol sights

Love that MPX..mine needs one of those...does the extra section come with it?

I comes as a two piece suppressor along with a piston housing. You just unscrew the front we took when you want to use it in short configuration. For the MPX I'm using a 3-lug adapter - same adapters as the Dead Air Ghost