What is a common feature of both LCS variants regarding armament?

Both variants of the Littoral Combat Ship (LCS), Freedom-class and Independence-class, are indeed equipped with a Mk-110 57mm gun. This common feature highlights their design for versatility and capability in engaging surface threats as well as providing naval gunfire support.

The Mk-110 gun offers a balance of firepower and versatility, as it is capable of firing a variety of munitions, making it effective in different operational scenarios. This shared armament system allows both LCS variants to conduct similar missions and engage similarly sized threats in littoral environments effectively.

The inclusion of the Mk-110 as a standard feature emphasizes the LCS program's goal of maintaining a modern naval force that can adapt to various combat situations while operating close to shore.