Originally Posted by
dao
The ECO is officer size, 3.5" barrel. The grips look ok, but they're slim. Also I'm pretty much stuck on flat bottom grips with no pin cutout. To me it just cleans up the whole bottom of the grip. Also, they look good with or without a magwell. I like the extra length the magwell adds to the shorter officer/cco/eco/ultra grips, and they sit just right in the heel of my hand. I've taken them off my commanders though because they just make the grip a bit too long on that size. Not that I'm fussy or anything... :D