The present disclosure provides systems and techniques for authenticating a user at gun. The gun may include an authentication manager capable of implementing logic, processing signals, or executing instructions. The authentication manager may receive first query data from a first authentication sensor of the gun, receive second query data from a second authentication sensor of the gun, perform an authentication procedure to determine whether the first query data or the second query data matches enrollment data, where a match is determined based on the first query data or the second query data and the enrollment data satisfying a similarity threshold. The authentication manager may determine that the user is authorized to operate the gun and transmit a signal in response to the determining that the user is authorized to operate the gun. The signal may cause the gun to enter an active state which allows the gun to be fired.