Will ups ship a replica gun to an individual in US?

Yes, but let's be sure we are using the same Words-

UPS, FedEx, and the US Postal service ship firearms, antique firearms, reproduction firearms, and replica firearms.

Goods entering the US will need to pass through US Customs, no matter who the shipping carrier.

Firearms are guns that discharge a bullet from a chemical explosion, and are made after 1898. They must be shipped to an importer.

Guns made before 1899, or muzzleloading guns (even if new)are Antique Firearms.

Reproduction firearms are a modern day copy of a real gun. They are treated the same as the original gun. If they shoot bullets, they are legally firearms (unless muzzleloaders)

REPLICA guns are a non-shooting, will not chamber real ammo, cannot be MADE to shoot copy of a real gun. They are not firearms.

Firearms, and reproduction firearms must be shipped TO a Federal Firearms Licensee in your home state (dealer). Antique firearms, and non-firing replicas may be shipped directly to you. Modern handguns (real kind) may not be mailed in the US mail except by dealers.