The Barrett MRAD 300 Win Mag conversion kit lets you transform your modular rifle platform to shoot one of long-range hunting's most capable cartridges. This kit includes everything you need to swap calibers: a 24-inch stainless steel fluted barrel, the matching bolt, and a 10-round magazine. If you already own an MRAD system and want to add 300 Winchester Magnum to your arsenal without buying an entire new rifle, this is the cost-effective route. The fluted barrel design reduces weight while maintaining rigidity—a practical feature for field work where every ounce matters over long distances.
Barrett engineered the MRAD platform around this kind of modularity, so swapping barrels and bolts is straightforward. You get a ZCORR anti-corrosion bag to protect your components during storage and transport, and everything comes in branded packaging. Note that if you're running an earlier MRAD generation, you may need an additional breech conversion kit to complete the swap—verify your receiver's breech size before ordering.
The 300 Win Mag is proven medicine for open-country hunting and long-range target work: serious velocity, excellent ballistics, and enough wind-bucking performance to keep bullet drop manageable at extended range. Pair this conversion kit with your existing MRAD lower and you've got a purpose-built rifle ready for the field.
| Caliber | 300 Winchester Magnum |
| Barrel Length | 24 inches |
| Barrel Material | Stainless Steel |
| Barrel Profile | Fluted |
| Magazine Capacity | 10 rounds |
| Components Included | Barrel, Bolt, Magazine, Anti-corrosion Bag |
Possibly, but earlier MRAD models may have a different breech size. Verify your receiver's breech configuration before purchasing. If you have an older small-breech receiver, you'll need a large-to-small breech conversion kit to use this barrel and bolt assembly.
This conversion kit is designed for shooters who already own an MRAD receiver and want to add a new caliber without purchasing an entire second rifle. It's the modular approach to expanding your system.
Fluting reduces barrel weight while preserving stiffness and heat dissipation characteristics. For field hunting and long-range shooting, lighter weight makes a real difference in carry and mounting, without sacrificing the precision you need for precision shots.
The kit includes the barrel, bolt, magazine, and anti-corrosion bag. You'll also need ammunition, a rifle receiver (MRAD platform), and your preferred optics and accessories to build a complete rifle.
Barnett Outdoors
Barnett Outdoors
Barnett Outdoors
Barnett Outdoors
