Winchester Model 12, 12 Ga. Breech Bolt Assembly - Complete. Please message me if you’d like to choose between a flat bottom bolt face or a circular bolt face. I also like to make sure the condition of the item I send is satisfactory to the customer and will provide pictures of what you’ll receive prior to purchase/shipping. All are in similar condition. These came as part of an estate sale of a large lot of Winchester model 12 parts that were kept meticulously organized by their owner. Any questions, just ask! Thank you!