Description
There's a reason the .300 Weatherby Magnum has stayed on elk mountains and plains hunts for over 75 years, and the Mark V CarbonMark BLK is one of the best-shooting homes it has ever had. This limited-run build wraps a BSF carbon fiber barrel around the famous Mark V action, giving you magnum reach without the magnum weight penalty. At 7.9 pounds bare, it hauls up a ridge a whole lot easier than a comparable steel-barreled rifle in this chambering, and the blacked-out look with Graphite Black Cerakote is clean without being flashy.
Why the CarbonMark BLK Barrel Matters
The BSF carbon fiber barrel isn't just about shaving ounces. The carbon sleeve is tensioned over a steel core in a way that keeps the vast majority of the carbon off the barrel itself, so air can move around the steel and pull heat away fast. That means your third and fourth shots land where your first one did, which is exactly what Weatherby backs up with a sub-MOA guarantee: a three-shot group under an inch at 100 yards from a cold bore with Weatherby factory or premium ammunition. The muzzle wears 5/8×24 threads and a brake from the factory, which takes real bite out of the .300 Wby's recoil, and you can swap to a suppressor whenever you like.
Mark V CarbonMark BLK in the Field
The TriggerTech trigger breaks clean with zero creep and barely any over-travel, and it's externally adjustable if you like it lighter or heavier. The spiral-fluted bolt runs smooth and sheds weight, the classic Monte Carlo comb on the black synthetic stock lines your eye up naturally behind a scope, and the drilled-and-tapped receiver makes mounting glass simple. With 3+1 capacity and a 1:10 twist that stabilizes the heavy bullets this cartridge loves, this is a rifle built for the hunter who wants one do-it-all magnum that earns its spot in the truck every season.
Key Specifications
- Manufacturer: Weatherby
- Model: Mark V CarbonMark BLK
- Manufacturer Part Number: MCM02N300WR4T
- UPC: 747115463022
- Action: Bolt Action
- Caliber: .300 Weatherby Magnum
- Capacity: 3 + 1
- Barrel: 24" BSF carbon fiber (22" barrel + 2" muzzle brake)
- Twist Rate: 1:10
- Muzzle Threads: 5/8×24
- Overall Length: 46.25"
- Weight: 7.9 lbs
- Trigger: TriggerTech, externally adjustable
- Stock: Black synthetic with Monte Carlo comb
- Finish: Graphite Black Cerakote
- Sights: None; receiver drilled and tapped for optics
What’s Included
- Weatherby Mark V CarbonMark BLK rifle
- Factory-installed muzzle brake
- Owner's manual
Frequently Asked Questions
Is the Weatherby Mark V CarbonMark BLK covered by an accuracy guarantee?
Yes. Like all Mark V rifles, it carries Weatherby's sub-MOA guarantee, meaning a three-shot group of .99 inches or less at 100 yards from a cold barrel when fired with Weatherby factory or premium ammunition. That guarantee applies to the original purchaser for two years from the verified purchase date.
Can I run a suppressor on the CarbonMark BLK?
You can. The barrel is threaded 5/8×24, which is the standard pattern for most .30 caliber suppressors and muzzle devices. Remove the factory brake and your can threads right on. The stiff carbon fiber barrel also tends to hold its point of impact well when swapping muzzle devices.
How does the 24 inch barrel measurement break down on this rifle?
Weatherby lists the .300 Wby Mag CarbonMark BLK at 24 inches overall at the muzzle, which is a 22 inch BSF carbon fiber barrel plus a 2 inch factory muzzle brake. The .300 Weatherby still produces excellent velocity from that length, and the shorter tube keeps the rifle handier in timber and in a blind.
Does the Mark V CarbonMark BLK come with a scope or sights?
No, it ships without sights or optics. The receiver comes drilled and tapped from the factory, so mounting a scope base is quick and straightforward. Given the reach of the .300 Weatherby Magnum, most owners pair it with quality glass in the 3-15x or 4-16x range.





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