(Please tell me if this isn't the right place to post this)

These guns below will go through the metal walls of the military cargo tower, killing who's inside it:

• 6.5mm gatling (Orca heli and Qilin jeep)
• 7.62mm minigun (Pawnee heli)

These guns below will not:

• 12.7mm machine gun of the MRAPs
• 12.7mm Lynx sniper rifle (with standard rounds)
• .408 M320 sniper rifle

I guess 12.7mm rounds should penetrate more than 6.5mm rounds?

Thanks for the attention