Andy, it is fully assembled and functional right out of the box Sir. Just read and follow manufacturer recommended break in and maintenance and you will be fine. Cheers and stay safe!

Comes already assembled, remove the gun from the box, take out the chamber flag, load the tube mag and its ready to go ( if you wanted to)
I always disassemble, clean and lube EVERY gun that I purchase before I shoot them for the first time. This helps to extend the life of the firearm by removing factory grease, and lubricating critical components.