Browning BPS Hunter Extra Barrel Important: do not attempt the use of 3 1/2" chambered barrels with 3" receivers nor 3" chambered barrels with 3 1/2" receivers. Specifications: - Gauge: 28 - Chamber Size: 2 3/4" - Barrel Length: 28" - Barrel Finish: Blued - Chokes Included: Full, Improved Cylinder, Modified