Winchester Model 1300 Black Shadow Cantilever
http://www.winchesterguns.com/products/catalog/historic-detail.asp?family=012C&mid=5120401


Add a low-profile, Weaver-style cantilever scope mount to a rifled 22" barrel and you’ll have the most accurate pump-action slug gun available. The solid cantilever mount keeps the scope firmly connected to the barrel, ensuring the scope stays sighted in while allowing the shotgun to easily be taken down for cleaning. The composite stock with raised comb is ideal for medium eye-relief scopes that provide exceptional field of view. 12 gauge only. (Scope not included.)