Ark. Code Ann. § 23-12-703

Each police officer shall have and exercise throughout the State of Arkansas the power to make arrests for the violation of any law on the property of the company, and to arrest persons, whether on or off the company's property, for the violation of any law on the company's property, under the same conditions under which deputy sheriffs or other peace officers may by law make arrests and shall have the authority to carry weapons for the reasonable purposes of the office of railroad police officer.