Winchester Model 1400 Mk II 20 Gauge Semi-Auto Shotgun, 28" Plain Barrel, WinChoke, Custom Synthetic Stock, 1978-1979
This Winchester Model 1400 Mk II is a gas-operated 20 gauge from the late 1970s, built in New Haven, Connecticut. It features a 28-inch plain steel barrel with the WinChoke screw-in choke system, an alloy receiver, and a customized black synthetic pistol-grip buttstock with a 12.0-inch length of pull. The shotgun retains its classic checkered wood forend and uses a simple single front bead sight with a cross-bolt safety.
The Mk II designation and 1978–1979 production window place this shotgun in a desirable period for the Model 1400 series. Its configuration combines Winchester’s factory WinChoke system and alloy receiver with a practical aftermarket stock for a durable, easy-to-handle setup. Chambered for 2 3/4-inch shells and built with a 2+1 capacity, it offers straightforward operation and clean lines without a ventilated rib.
Barrel markings confirm manufacture in New Haven, Connecticut, U.S.A. The threaded barrel includes an installed screw-in choke tube, and the forend carries bordered diamond checkering. The cross-bolt safety, single front bead, and gas-operated action round out a straightforward, user-friendly layout.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Good - Clean, well-maintained, minor wear marks.
Specific Condition Notes: The shotgun is in solid shape with visible cosmetic imperfections, including scratches, blemishes, and areas of finish loss. The bore remains clean and shiny.
What’s Included
- Winchester Model 1400 Mk II 20 Gauge semi-automatic shotgun
- Installed WinChoke screw-in choke tube
The 28-inch plain barrel is threaded for Winchester’s WinChoke system and comes with a screw-in choke installed. The lack of a ventilated rib keeps the sight picture simple with a single front bead. The steel barrel is paired with an alloy receiver for a proven Model 1400 Mk II configuration.
This example has been customized with an aftermarket black synthetic pistol-grip buttstock featuring finger grooves and a rear sling swivel stud. The 12.0-inch length of pull provides a compact shoulder fit. Up front, the wood forend retains bordered diamond checkering for a secure hold.
It is chambered for 2 3/4-inch shells and configured with a 2+1 capacity. Controls are straightforward, with a cross-bolt safety and the Model 1400’s gas-operated semi-automatic action. Manufacture markings indicate production in New Haven, Connecticut, during the 1970s.