The Winchester SX4 Cantilever Buck in 20 gauge (brand part no. 511215640) is a purpose-built semi-automatic slug gun featuring a 22-inch rifled barrel optimized for sabots and slugs, finished in a non-glare matte black synthetic build. Winchester tops the Cantilever Buck with a Weaver-style cantilever rail for mounting an electronic sight or conventional scope, and a TruGlo fiber-optic front sight pairs with an adjustable rear sight for backup aiming. Among shotguns in the semi-auto shotguns category, this Cantilever Buck favors deer hunters who want a dedicated slug gun rather than a repurposed field shotgun.

Key Specifications

• Chambered in 20 gauge with a 3-inch chamber.
• Features a 22-inch rifled barrel optimized for sabots and slugs.
• Feeds from a magazine with a 3+1 capacity.
• Topped with a Weaver-style cantilever rail for scope or electronic sight mounting.
• Sighted with a TruGlo fiber-optic front sight and adjustable rear sight.
• Runs on the self-adjusting Active Valve system.
• Equipped with an ambidextrous crossbolt safety.
• Overall length is 43 inches, weighing approximately 7 pounds 4 ounces.
• Finished in non-glare matte black.

Frequently Asked Questions

What is this barrel optimized for? Sabots and slugs, using a rifled 22-inch barrel for extreme accuracy.

Can this shotgun mount a scope? Yes, a Weaver-style cantilever rail is built onto the barrel.

Buy the Winchester SX4 Cantilever Buck Shotgun

A dedicated slug gun rather than a repurposed field shotgun is exactly what the Cantilever Buck delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.