Winchester SX4 Cantilever Buck | 12 Gauge | 22 in | 511215340

The Winchester SX4 Cantilever Buck is a purpose-built 12 Gauge semi-automatic shotgun equipped with a 22 inch fully-rifled barrel and a Weaver-style cantilever rail for optics or red-dot mounting. It combines a black aluminum receiver and a fixed black synthetic stock with ergonomic checkering and an Inflex Technology recoil pad to manage recoil. The shotgun ships with TruGlo fiber-optic front and adjustable rear sights and a drop-out trigger group for simplified maintenance. This configuration is intended for slug use and medium-game hunting applications where rifled-barrel performance and the ability to mount an optic are priorities.

Product Specifications

• The manufacturer is Winchester.
• The model is the SX4 Cantilever Buck.
• The manufacturer part number (MPN) is 511215340.
• The UPC is 048702010118.
• The gauge is 12 Gauge.
• The maximum chamber size is 3″.
• The barrel measures 22 inches and is specified as fully-rifled.
• The action type is Semi-Auto.
• The magazine capacity is 4 + 1.
• The overall length is 43 inches.
• The listed weight is approximately 7.5 lbs.
• The stock is black synthetic with checkering and swivel studs.
• The receiver is specified as black aluminum with a matte finish.
• The sights are TruGlo fiber-optic front and adjustable rear, and it includes a Weaver-style cantilever rail for optics.
• Additional features include Inflex Technology recoil pad, drop-out trigger group, and an Active Valve System to aid cycling a range of loads.

The SX4 Cantilever Buck is focused on delivering slug-barrel accuracy with the flexibility to fit an optic via the cantilever mount and the handling of a modern semi-automatic platform. Its combination of a rifled 22″ barrel, fiber-optic sights and synthetic ergonomics makes it a practical choice for hunters and shooters who prioritize reliable cycling, quick target acquisition, and the option to mount electronic sights for longer-shot work.