I hesitate to link to this as I’m suddenly sure of where my boys’ future Christmas wish lists will be from. Key website quote:

Ever since BrickArms first started selling toys in 2006, we have always included at least one free weapon in every order.

I can only assume that Santa is concerned about Somali pirates on his Christmas Eve run. You can never be too careful. Although I expect the front mounted sleigh turret has Blitzen a little nervous.