Carlson’s high quality replacement shotgun barrels are designed specifically for the Remington 870. These barrels are made from 4140 steel and feature chrome lined bores. They have been threaded to accept Remington Chokes which enhances the versatility and performance of your shotgun. – Specifications and Features: – Carlson’s Replacement shotgun barrel 87004 – 12 Gauge – 18.5 chrome lined barrel – 3 Chamber – Remington choke threaded – Cylinder choke included – Ramped front sight – Matte Black – Fits: Remington 870 12 Gauge Shotguns – Note: This barrel will not fit the new factory Remington 870 tactical models with the 6 shot magazine tubes.