This Remington manufactured 30" long vent rib barrel with a fixed full choke and a 3" chamber is for the model 1100 Magnum semi-auto shotgun in 12 gauge and is in very good condition except for one spot of rust located on the left side at the rear. (file photos)

Note: Remington model 1100 Magnum semi-auto shotguns with the following date codes and serial numbers have been observed with this part: M855933M

AP (March 1967): 399178M