What type of firearm can a commissioned security officer carry?

A commissioned security officer may carry only the type of firearm they were trained with to ensure safety and compliance with regulatory standards. This requirement is established to ensure that officers are proficient and knowledgeable about the specific firearm they are authorized to carry. Proper training helps the officer understand the handling, operation, and legal implications of using that firearm.

Training with a specific type of firearm not only increases the officer's confidence but also ensures they can effectively respond to situations requiring armed intervention. By limiting the type of firearm to only those for which they have received training, the regulations aim to minimize risks associated with accidental discharges and mishandling. Furthermore, the focus on training reinforces a high standard of professionalism and responsibility within private security operations.

The other options, while they may present varying aspects of firearm possession, do not align with the regulations governing commissioned security officers in Texas, which specifically emphasize the necessity of training with the type of firearm they carry.