Originally Posted by
Freedom Ventures
Guns with thin grips look horrible with standard width magwells, they stick out at the bottom of the gun, so they came up with magwells to match grips.
"Regular" magwells match the thickness of regular 1911 grips, while "slim" magwells match the thickness of the 1911 thin grips.
Neither - when mated with the correct grips - stick out like a 2011 magwell.
Both are fine for IPSC; I don't know about IDPA - but I'm pretty sure you'll be fine.
For a Spartan V - assuming you never changed the grips - the appropriate magwell would be a regular one.