MCX lower question

[scoob]

I have a Gen 1 MCX upper and conversion on my SBR lower. Now I'm looking to pick up a rattler pistol and Form 1 that. Does anyone know if my gen 1 MCX upper will work on the newer rattler lower? Thanks in advance for any help.

[SilentRecon]

Was there any modifications to fit your AR Lower? If yes, then no. I'm not 100% I've not heard swapping those.

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[Aries144]

I don't believe there's much if any difference between MCX, Virtus, and Rattler lowers.