The inventory is a mechanic in Resident Evil 6.
Gameplay
The inventory in Resident Evil 6 is slightly different to others as not only is it opened in real time, but the player can also still move around whilst it's open.
There is a limit to how much the player can carry, however this is not explicitly stated and doesn't apply to weapons as there will always be enough room in a campaign for all the available weapons. However, items such as grenades and first aid sprays stack up to five on one slot, ammo up to 50 and herbs take up one slot each, however these can be combined to take up less room, or stored as Health Tablets, which have no maximum limit.
Input
The following are the default inputs in Resident Evil 6:
PlayStation 3/4 | XBOX 360/ONE | PC | |
Open/Close Item Menu | Triangle | Y | E |
Weapon Switch | Left and right on the D Pad | Left and right on the D Pad | Mouse wheel up and down |
Item Switch | Up and down on D pad | Up and down on D pad | Ctrl + Mouse wheel |
Select Item to Drop/Give | Square | X | E |