AR-10 – .300 WSM


AR-10 – .300 WSM


Out of stock


AR-10 .300 WSM Custom Barrel – Elevate Your AR-10 to Precision Excellence

Welcome to Dead Shot Barrels, where precision and power unite in our AR-10 .300 WSM custom barrels, meticulously crafted to enhance your shooting experience. Explore the superiority of the .300 Winchester Short Magnum (WSM) round and our commitment to delivering unmatched accuracy and performance.

Why Choose the .300 WSM Round: Superior Ballistics, Enhanced Performance

The .300 WSM is a testament to exceptional ballistics, combining impressive velocity, flat trajectory, and formidable stopping power. It’s the preferred choice of discerning shooters and hunters who demand pinpoint accuracy and outstanding terminal performance. Whether you’re targeting long-range precision or pursuing big game, the .300 WSM delivers the accuracy and energy you need.

The .300 WSM (Winchester Short Magnum) is a cartridge developed by Winchester for use in hunting rifles. It is a high-performance round that is designed for long-range shooting and hunting. It is capable of shooting bullets weighing from 120 to 220 grains, and can achieve velocities of up to 3,400 feet per second (1,036 meters per second).

The .300 WSM is based on the .375 Winchester Short Magnum case, which has been necked down to accept a .30 caliber bullet. It is intended to be used in short-action rifles, which are characterized by having a shorter bolt travel than long-action rifles. This allows for faster cycling of the bolt, making it easier to shoot multiple shots in quick succession.

In terms of performance, the .300 WSM is similar to other .30 caliber magnum cartridges, such as the .300 Remington Ultra Magnum and the .300 RSAUM (Remington Short Action Ultra Magnum). However, it is generally considered to be more powerful than these cartridges, and may have slightly higher recoil as a result. It is typically used with a 1:10 twist rate barrel, which is suitable for stabilizing the wide range of bullet weights that can be used with this cartridge.

Overall, the .300 WSM is a high-performance cartridge that is well-suited for long-range shooting and hunting medium to large game. It offers a combination of accuracy, power, and versatility, making it a popular choice among shooters and hunters.

Customization Beyond Expectations – Your AR-10, Your Way

At Dead Shot Barrels, we believe in empowering shooters with unparalleled customization options. Our AR-10 .300 WSM custom barrels offer an array of choices to create your perfect barrel:

  • Brand – Material – Twist: Choose between CM – 1:10,  Green Mountain SS – 1:10 or Lothar Walther – SS – 1:10  to start your custom build.
  • Barrel Length: Tailor your rifle to different shooting scenarios with a range of barrel lengths.
  • Gas System Lengths: Enhance gas pressure and cycling efficiency with various gas system length options.
  • Gas Tubes: Ensure reliability and performance with precision-engineered gas tubes.
  • Profile and Gas Block Size: Achieve the ideal balance and accuracy with choices like SOCOM .750, HBAR .750, HBAR .875, and Bull .936.
  • Optional Gas Blocks: Fine-tune gas flow and control with your preference of standard or adjustable gas blocks.
  • Fluting Options: Customize aesthetics and reduce weight with fluting styles like 6 Groove, Diamond, or Spiral.
  • Thread/Crown Options: Personalize your barrel’s appearance and performance with options such as Target Crown, Magna Port, Gill Cut, and 5/8″x24 threads.
  • Optional Bolts: Ensure precise alignment with our premium bolts or submit your current bolt for a perfect fit.
  • Cerakote Finish: Protect your barrel and express your style with a durable Cerakote color of your choice.

Stainless Steel Excellence – Uncompromising Smoothness with SS Ground Finishing

For the pinnacle of refinement, choose our stainless steel option enhanced with SS Ground Finishing. Experience a smooth, mirror-like surface that looks stunning in the field or the safe. Take it a step further with a striking 2-tone Ground Finish by pairing a stainless steel barrel, fluting, and your preferred Cerakote color.

Fast Turnaround Time: Your Perfect Barrel, Delivered

We understand the anticipation of upgrading your rifle, which is why our turnaround time for complete assemblies is 5-10 weeks. Your patience will be rewarded with a custom AR-10 .300 WSM barrel, setting new standards in shooting excellence.

Elevate Your Shooting – Order Your AR-10 .300 WSM Custom Barrel Today!

Elevate your AR-10 rifle to new heights with Dead Shot Barrels’ AR-10 .300 WSM Custom Barrel. Experience unparalleled precision, power, and personalization possibilities. Order now and redefine your shooting potential!

Turnaround Time:


Compatible with Armalite and DPMS platform rifles.

***Please make sure to use a DPMS style BCG.***

Try our Cerakote “Stainless” finish. It looks identical to bead blast, but doesn’t soak up oils or scratch easily.



If you placed an order via credit card, the fees charged to us by our merchant account will be deducted from your refund.
Custom barrels are warrantied but not subject to full refunds.


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