| Kettle III Semi-automatic assault rifle. Quick and accurate, but has low bullet velocity and takes a long time reload. | Weapon | |
| Kettle IV Semi-automatic assault rifle. Quick and accurate, but has low bullet velocity and takes a long time reload. | Weapon | |
| Key Card A security key card used to access restricted areas. | Key | |
| Kinetic Converter Moderately increases fire rate. | Modification | |
| Kinetic Converter Recipe Lets you craft a Kinetic Converter | Recipe | |
| Laboratory Reagents Can be recycled into crafting materials. | Recyclable | |
| Lance's Mixtape (5th Edition) A rare mixtape, highly sought after by collectors. | Trinket | |
| Laser Trap: Fire Recipe Lets you craft Laser Trap: Fire | Recipe | |
| Laser Trap: Gas Recipe Lets you craft Laser Trap: Gas | Recipe | |
| Laser Trap: Lure A deployable laser trip wire that detonates a Lure Grenade. | Quick Use | |
| Laser Trap: Smoke Lets you craft Laser Trap: Smoke | Quick Use | |
| Lemon A sour citrus fruit. | Consumable | |
| Light Ammo Light bullets used mainly with SMGs and light handguns. Such as Kettle, Stitcher, Burletta, Hairpin and Bobcat. | Ammunition | |
| Light Bulb A fragile glass bulb for lighting. | Trinket | |
| Light Gun Parts Assorted spare parts used for pistols and SMGs. | Topside Material | |
| Light Gun Parts Recipe Lets you craft Light Gun Parts | Recipe | |
| Light Impact Grenade A grenade that detonates on impact, dealing explosive damage in a small radius. | Quick Use | |
| Light Shield A lightweight shield that offers limited protection without severely impacting mobility. | Shield | |
| Lightweight Stock Moderately improves ADS & draw speed. | Mods | |
| Lightweight Stock Recipe Lets you craft a Lightweight Stock | Recipe | |
| Li'l Smoke Grenade A grenade that pops a thick but small smoke cloud on impact, blocking visibility from ARC and other Raiders. | Explosive | |
| Looting MK. 1 Basic looting augment. More backpack slots and weight capacity, but low defensive and tactical capability. | Augment | |
| Lure Grenade A noisy device that sticks to surfaces, distracting nearby ARC machines and drawing their fire. | Quick Use | |
| Lure Grenade Recipe Lets you craft a Lure Grenade | Recipe | |
| Magnet Fun thing to put on a fridgerator. | Topside Material | |
| Magnetic Accelerator Used to craft advanced weapons. | Refined Material | |
| magnet-recipe | component | |
| Mechanical Components Used to craft a wide range of items. Can be recycled into crafting materials. | Refined Material | |
| mechanical-components-recipe | component | |
| Medium Ammo Medium bullets used mainly with medium-caliber weapons. Such as Rattler, Tempest, Arpeggio, Renegade and Torrente. | Ammunition | |
| Medium Gun Parts Assorted spare parts used for rifles. | Topside Material | |
| Medium Gun Parts Recipe Lets you craft Medium Gun Parts | Recipe | |
| Medium Shield A standard shield that blocks a medium portion of incoming damage at a moderate cost to mobility. | Shield | |
| Metal Brackets Can be recycled into metal parts. | Recyclable | |
| Metal Parts Used to craft a wide range of items. | Basic Material | |
| Mod Components Used to craft weapon mods. Can be recycled into crafting materials. | Refined Material | |
| Mod Components Recipe Lets you craft Mod Components | Recipe | |
| Moss Can be used to regain a small amount of health. | Material | |
| moss-recipe | component | |
| Motor A small electric motor, useful for various devices. | Recyclable | |
