On Mon, 30 Nov 2015 09:45:11 -0800 (PST), wrote:

Understood about MC vs. FMC.

I know these are intended for NM, but are they suitable for MC:

http://www.homedepot.com/p/Halex-3-8...0511/100133208

Alot less expensive than the snap fittings .
Just wondering.

Short answer No

They are only listed for non-metalic cable. They are missing the
insulated throat a MC connector has. Used properly an NM connector is
isolated from the conductors by the cable jacket which should extend
1/4" into the box.