Marlin Glenfield Model 50 12 Gauge Bolt-Action Shotgun, 18.5 in Barrel, Blued Receiver, In-the-White Barrel, Detachable Magazine, 1966–1973 Production
This Marlin Glenfield Model 50 is a bolt-action 12-gauge shotgun with a detachable box magazine and a short 1966–1973 production run under Marlin’s Glenfield line. It features an 18.5 in smoothbore barrel, steel construction with a blued receiver and an in-the-white barrel, and two drilled and tapped holes atop the chamber area for a scope base. Its uncommon bolt-action, magazine-fed configuration among American sporting shotguns and the inclusion of three factory-type 2-round magazines make this a noteworthy example.
Built in the United States, this Model 50 combines simple, rugged operation with practical features like a fixed front sight, a cross-bolt safety, and a cocking indicator. The hardwood stock has a gloss finish and useful field details, including sling loops, a straight comb, and a black buttplate, with a 13.5 in length of pull.
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: This firearm is in solid shape. It shows various cosmetic imperfections, including scratches, blemishes, and areas of finish loss.
What’s Included
- Marlin Glenfield Model 50 12 gauge bolt-action shotgun
- Three 2-round stamped-steel detachable box magazines for the Glenfield/Marlin Model 50
The Model 50’s bolt-action, detachable box-magazine system provides a 2+1 capacity and sets it apart from most domestic sporting shotguns of its era. This example includes three 2-round magazines that are specific to the platform.
The 18.5 in steel barrel is a smoothbore with no vent rib and is paired with a fixed front sight; there is no rear sight. Two drilled and tapped holes are positioned atop the chamber area to accept a scope base.
Construction is all-steel where it counts: an in-the-white steel barrel and a blued steel receiver. Safety features include a cross-bolt safety and a cocking indicator for clear status at a glance. Country of origin is the United States.
The hardwood stock wears a gloss finish and adds practical touches, including sling loops, a straight comb, and a black buttplate. Length of pull is 13.5 in. Produced from 1966 to 1973 under Marlin’s Glenfield value line, the Model 50 had a short run and remains an uncommon configuration in the market.

