My SYKCO 511 had a slight convex primary grind, V-edge, but most of the rats, dogs, & hogs I've handled were flat-grind in both the primary and the edge-bevel. I usually knock the bevel shoulders off and blend them back convex myself.
The current models from Swamp and Yard are CNC'd and most have a slightly convex saber grind, most and that's my eye, not measured with any sort of instrument. But they are very close to flat primary grind.
Bevels, in my experience, are slightly convex, but that would not be a surprise given they're meant to be sharpened on slack belt on the grinder.
My RMD came with a saber with a flat grind to a convex edge. These knives are sharpened by hand and almost every time you have a hand sharpened edge it will have a slight convex to it.
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