And it will take the same $25 hose swivel (OmniSwivel knock-off) that all my other regs use? I would have sworn I read somewhere that Atomic hose swivels would not fit on other regs.
The M1 doesn't come with a LP second stage swivel. The other regulators; Z3, B2, ST1 and the T3 come with the swivel and hence you will have to replace the hose and buy their jam nut if you want to use a third party swivel. I bought a standard 40" hose and a jam nut for my ST1 and used the Omniswivel. The M1 uses a standard LP second stage hose and thus you just add the omniswivel directly to the hose that comes with the regulator.