Unlike previous titles, the weapons in GTA IV have two strength tiers instead of the usual three. Also there are no model names for weapons (For example, M4A1 is called Carbine Rifle). Also, weapons spawned in the map or dropped by an NPC will not float in the air, like in previous installments; they will instead lie on the ground and emit a slight orange glow, in order to be more noticeable to the player. Dropped guns act like any other interactable prop in the game; they can be moved if anything touches them (vehicle, NPCs, bullets, etc.)