Which is the lightest component?

• A. Weight of the MK19 Receiver
• B. Weight of the 240B SL3 Bag
• C. Weight of the Cradle
• D. Weight of the 240B Barrel

Answer: (D)

In this item, the focus is on which part has the smallest mass among major weapon components. The barrel is the lightest because it’s a relatively slim, replaceable tube designed mainly for a specific function (barrel wear and heat dissipation), whereas the other parts carry more mass by virtue of their roles and construction.

The MK19 receiver is a substantial forged block that houses the firing mechanism and feed system, so it weighs a lot. The cradle is a sturdy support assembly that must bear the weight of the weapon and ammunition, adding significant mass. The 240B SL3 bag is part of the mounting/stabilization setup and, even when empty, contributes notable weight, especially if it’s loaded or used to contain components. The barrel, while long, is thinner-walled and optimized for replacement, making it lighter than the heavier, bulkier assemblies around it.

So the lightest component among these is the barrel.