This is a paid asset, but now you can download Character for multiplayer FPS game Free.
Detail this asset from Unity Store: Original Link
Character for multiplayer FPS game v1.0 (Latest version)
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This package includes a full set of animations of the movement of the character in the position of sitting , lying , sliding tackle , standing up . Basic set of scripts only 14 .3 prefab dynamic crosshairs depends on the accuracy of the bullet spread within a radius of a cross hair . The HUD displaying the ammo , armor condition , health, character , the name of the weapon . Prefab menu modifier weapon allows the move to change the sights,silencers and grips.