Up for sale is a classic, North Haven CT ("JM" era) Marlin Model 512 Slugmaster 12-gauge bolt-action slug gun, ready to go for November deer season.  

Built specifically for sabot slugs, the Model 512 features a heavy 21" fully rifled barrel and a solid bolt-action receiver that delivers rifle-like accuracy out past 125+ yards.  

Specs & Included Gear:

Manufacturer: The Marlin Firearms Co. (North Haven, CT USA — 1990s production)  

Gauge / Chamber: 12 Gauge — 3" Chamber (accepts 2¾" and 3" shells)  

Barrel: 21" Heavy-wall fully rifled bore with factory adjustable folding leaf rear sight and front ramp sight still intact.  

Magazine: Includes the original (and hard-to-find) 2-round detachable box magazine.  

Stock: Hardwood Monte Carlo stock with diamond checkering and factory rubber recoil pad.  

Optic & Accessories: Mounted with a Simmons shotgun scope on Weaver rings/base, plus a padded camo/leather sling on swivel studs. 

... comes with basic case as well  

Condition:

Good, honest hunting condition. Mechanically solid with a smooth bolt, crisp trigger, and bright rifling. The wood and bluing have normal light field/handling marks from over the years, but everything is complete and ready to hit the range and zero.  

Price: $375 cash OBO.

Local face-to-face meetup (must be a legal WI resident able to possess a firearm). Shoot me a message if you have any questions!

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