I believe I read it some where, that the Uberti, does not lock back closed, in the cocked posistion, this is after you rack the action, and hammer is back. It is a copy of the Colt Lightning pump action Rifle of the late 1800s. I don't know if the original colts lock closed in battery, or not. I have never handled either.
I have a Taurus Thunderbolt in .45 colt, and it locks back in battery. The Thunderbolt, is Taurus' copy of the Colt Lightning.
Rebel Dave