Gears of war 3 ending explanation

[*SuperSerial (01)]

Alright so, I see Carmine at the end the "grub killer" one and earlier I thought I saw him being beaten to death with his arm and I kinda thought maybe the brothers have same armor stuff... But I'd like you to tell me or give your opinion

Thanks!

 

[A51-BlackenedDawn-]

Serial 