M18x fits inside Orion 17" bag just fine.

[Brian]

Eat your heart out wbabt! LOL! Ok I'll admit, its a fairly snug fit but it does fit regardless:

[Michael]

yeah ok, i wouldn't call it a perfect fit

good that i ordered my 18x Orion

[wbabt007]

-shakes fist- you win this round Brian, but I be back muahahahawa , but hey Michael is right that is not a good fit, but fit regardless, victory shall be mine, (someday)

-goes back to lurking-

[Brian]

Yup definitely not the best fit or the safest unless you use a sleeve with it. If I do use my Orion, I'm just gonna stick my M18x in this really nice padded sleeve I got and toss it inside my Orion backpack rather than use that compartment.