Which weighs 58 units?

• A. 240B Barrel
• B. M2 Receiver
• C. 240B SL3 Bag
• D. M2 Barrel

Answer: (B)

The weight value 58 units goes to the M2 receiver. The receiver is the central frame that houses the weapon’s operating mechanism and supports the rest of the components. It’s the heaviest single part in this set, which is why it matches the 58-unit weight. The other items are lighter: the 240B barrel is a replaceable long component but not as heavy as the receiver, the M2 barrel is substantial but not 58 units in this context, and the 240B SL3 bag is a soft accessory that weighs far less. So the M2 receiver is the part that weighs 58 units.