Valuation Guides by Make / Model Marlin Model 512 Slugmaster
Published: September 13, 2025 | Updated: February 27, 2026
This range reflects current U.S. secondary market pricing and specific configurations, condition, or included accessories can move value above or below the range.
Marlin Quality
The Marlin Model 512 Slugmaster is a bolt-action shotgun built specifically for shooting slugs, making it a top choice for deer hunting in slug-only states. It comes chambered in 12 or 20 gauge.
If you are researching the value of a Marlin Model 512 Slugmaster, current market prices depend on condition, configuration and production variant. You can also explore our full Marlin firearm value guide to compare prices across other Marlin models.
With a rifled barrel, detachable magazine, and heavy-duty construction, the 512 Slugmaster is highly accurate and built to withstand tough hunting conditions.
At WeBuyGuns.com, we understand the market value of these firearms and are committed to providing you with a fair and competitive offer. Submit your Marlin Model 512 Slugmaster today for a free valuation and let us make an offer that reflects the quality and legacy of your firearm.
The Marlin Model 512 Slugmaster is available in a variety of models and configurations, each catering to different shooting needs and preferences. Below are some of the most popular variants, each offering unique features:
Marlin 512 Slugmaster 12 Gauge
Bolt-action 12-gauge shotgun with rifled barrel and box magazine, designed for slug use.
Marlin 512 Slugmaster 20 Gauge
Compact 20-gauge version ideal for younger shooters or tighter woods hunting.
Don’t see your specific model listed? No problem!
We value firearms of all types, whether they’re common or unique.
Start your free, no-obligation offer!When determining the value of your Marlin Model 512 Slugmaster, several factors come into play. Here’s what we consider:
Condition:
Firearms in excellent condition — clean bore, minimal wear, and no significant damage — will command higher prices.
Accessories:
Adding accessories, optics, additional magazines and having original packaging can increase value.
Rarity:
Limited edition and vintage Marlin models in pristine condition often have added value.
Market Demand:
Popular models perform well on the market due to their practicality and widespread use.
Original Box & Documentation:
Presence of the original Marlin box or case can increase offer value, lack of the original box will typically decrease the offer value.
Aftermarket Modifications:
Aftermarket modifications and finishing can affect offer values but rarely add significant value in the secondary market.
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Selling a firearm can be time-consuming and legally complex. At webuyguns.com, we streamline the process by purchasing directly from you, saving you time and ensuring a legally compliant, hassle-free transaction. With decades of experience, we provide fair market evaluations and encourage you to compare our offers locally to see the value we bring.
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Tell us what you have
Fill out a short form and upload a few photos. This helps us identify what you have.
Step 2
We verify your make & model
We review your information and images to assess the condition and value of your firearm.
Step 3
We make an offer
We’ll provide an offer on your firearm and, if accepted, provide a shipping label.
Understand the process of selling a firearm in your state with our in-depth guides. We break down local, state and federal regulations while providing the resources you need for a smooth, legal transaction.
Curious about your firearm’s value or what current market pricing is? Our manufacturer specific valuation guides provide insights into pricing, demand and key factors that affect value—helping you sell with confidence.
