A free mod for Mass Effect 3, by Spaceman20290.

This mod changes the key binding in Mass Effect 3 to allow the player to load Shepards’ game state from combat mode (standard mode during missions in Mass Effect 3, with weapons deployed) to exploration mode (with weapons holstered in their specific spots on the player). This way, Shepard can run around without pointing his gun at allies.

When you download this mod, you will be able to draw or holster the current weapon by simply pressing the page up key to deploy your weapon and page up to enter Shepard’s combat mode.