Carrying concealed can be broken down into high profile and low profile. In high profile, you might mask the sight of the weapon, but everyone knows you’re carrying. In low profile, the physical features of the firearm are obscured to the deepest cover. In the latter condition, you are not only trying to conceal the presence of a firearm, but the evidence you were carrying in the first place.
SureFire High-Capacity Magazines can provide the operator with some clear-cut tactical advantages, including increased initial firepower in ambush and active shooter situations, less downtime and target distraction in a firefight, the need for fewer reloads overall, and less bulk compared to drum magazines. Common SOP is to keep a SureFire High-Capacity Magazine in the weapon for initial contact and standard 30-round capacity magazines for reloads.