Savage Arms 19490: The Stevens 320 shotguns are well-built imported models carefully selected for their performance and value and provide many features only found on more expensive models. The 320 Field/Security Combo model features a proven rotary bolt design and dual slide bars for reliable operation. The receiver is a bottom load with right eject. This 12-gauge combo comes with two carbon steel barrels - the field is a 28\" vent-rib barrel with a bead sight and the security is an 18\" barrel with a bead sight.