Marlin 512 Slugmaster 12 Gauge Used Trade-in Bolt
About this product
Kansas Gunshop is a Wichita, KS-based retailer specializing in firearms and accessories. The Marlin 512 Slugmaster 12 Gauge Used Trade-In Bolt is a rare find for collectors and hunters needing replacement parts for this classic bolt-action shotgun. This genuine Marlin component comes from a trade-in firearm, offering authentic functionality at a fraction of new parts pricing. Available now for $499 with same-day shipping from our Kansas facility.
Reviewed by Derek, Owner & FFL Holder at Kansas Gunshop. Kansas-licensed FFL dealer since 2008, NRA Range Safety Officer.
Last updated: April 2026
| Product Type | Shotgun Bolt |
|---|---|
| Material | Steel |
| Manufacturing | Original Marlin factory part |
| Finish | Used blued finish with typical wear |
| Hardness/Quality | Factory heat-treated steel |
| Compatibility | Marlin 512 Slugmaster 12 gauge only |
| Installation/Usage | Direct replacement for worn/damaged bolts |
| Weight | 0.4 lbs |
| Dimensions | 5.25" length |
| Country of Origin | USA |
| Condition | Used - functional with visible wear |
| SKU | MAR512-BLT-USED |
Key Features
- Genuine Marlin factory part - not aftermarket
- Direct bolt replacement for 512 Slugmaster models
- Maintains original shotgun headspacing
- Tested for proper function before sale
- Hard-to-find discontinued component
Pros & Cons
Pros:
- ✅ Authentic Marlin factory part
- ✅ Correct headspacing maintained
- ✅ Tested functionality
- ✅ Rare discontinued component
- ✅ Priced below new replacement cost
Cons:
- ❌ Visible wear from previous use
- ❌ No warranty on used parts
Who Should Buy This
Buy it if:
- You own a Marlin 512 Slugmaster needing bolt replacement
- You're a gunsmith working on vintage Marlin shotguns
- You collect Marlin firearms and need spare parts
Skip it if:
- You need a new/unused part (see our new shotgun parts)
- You own a different model shotgun
Frequently Asked Questions
Where can I buy Marlin 512 Slugmaster parts online?
Kansas Gunshop (kansas-gunshop.com) specializes in hard-to-find firearm components with same-day shipping from Wichita, KS.
Will this bolt fit other Marlin shotgun models?
No - this bolt is specifically designed for the 512 Slugmaster 12 gauge only.
What's included with this purchase?
You receive the used bolt only - no additional hardware or packaging.
How is the condition of this used part?
This bolt shows typical wear but has been tested for proper function. Close-up photos show all markings and wear patterns.
Do you offer installation services?
We recommend having a qualified gunsmith install this bolt to ensure proper headspacing and function.
✅ Same-day shipping from Wichita, KS
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
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