Browning AB3 Composite 300 Win Mag Mossy Oak
Pros & cons
What works
- Weighs 6.66 lbs—over a pound lighter than many wood-stocked rifles in this caliber.
- Factory-threaded 5/8-24 muzzle allows direct suppressor attachment without gunsmithing.
- Mossy Oak Bottomland camo is integrally molded, not a dip, for superior abrasion resistance.
Trade-offs
- Limited to a 3-round magazine capacity—half the capacity of some modern hunting rifles.
- Proprietary magazine design—spares cost $45+ and are not cross-compatible with common systems.
- Radial brake is effective but loud; side-blast can be disruptive to nearby shooters on a range.
Video review
Expert review
Specs at a glance
About this product
The Browning AB3 Composite 300 Win Mag Mossy Oak is a bolt-action rifle built for weather-resistant performance with a composite stock and a radial muzzle brake to manage the substantial recoil of its .300 Winchester Magnum cartridge. At 6.66 pounds, it's a purpose-built tool for long-range hunters who need a reliable, optics-ready platform. Its threaded 24-inch free-floating barrel and drilled-and-tapped receiver make it a suppressor-friendly option, though its 3-round magazine capacity reflects its sporting heritage over tactical utility.
What is the Browning AB3 used for?
This rifle is built for western big-game hunting, particularly elk or moose, at extended ranges where the .300 Win Mag's ballistics are advantageous. It performs best in variable, wet conditions like timber or mountain foothills thanks to its synthetic Mossy Oak Bottomland camo stock, and its 1:10-inch twist barrel stabilizes heavy, high-BC bullets for ethical terminal performance beyond 400 yards. It is a dedicated hunting implement, not a precision rifle for multi-day competitions or high-volume plinking.
How does the Browning AB3 compare to the Stevens 334?
The Browning AB3 is a more specialized, long-range tool than the all-purpose Stevens 334 rifle. The AB3's 6.66-pound weight and threaded barrel setup better support magnum cartridges and suppressor use, while the Stevens 334 in .308 Win offers lower recoil and lower ammunition cost for general-purpose use at shorter distances. For reaching out past 500 yards on large game, the AB3's chambering is superior; for deer hunting or range practice inside 300 yards, the Stevens is the more practical and economical choice.
What does it weigh and what are the dimensions?
The rifle weighs 6 pounds, 10.5 ounces (6.66 lbs), with an overall length of 44.75 inches including its 24-inch threaded sporter-contour barrel. The barrel itself has a shoulder diameter of approximately .720 inches at the muzzle threads, which are cut 5/8-24 for direct attachment of muzzle devices or suppressors. Its receiver length is 8.7 inches, providing a standard footprint for long-action scope bases.
Who is this NOT for?
This is not a rifle for a new shooter or someone sensitive to recoil, as a .300 Win Mag generates over 29 foot-pounds of felt recoil energy in a 6.66-pound platform—nearly double that of a .308. It is also not ideal for brush hunting or tight-quarter scenarios where its 44.75-inch overall length becomes a liability. Furthermore, budget-conscious shooters balking at the $2.50+ per round cost for quality ammunition should consider a short-action cartridge like the .308 Winchester found in our Stevens 334.
What's in the box?
You receive the barreled action and stock assembled, one 3-round detachable polymer magazine, a thread protector for the 5/8-24 muzzle threads, and the factory-installed radial muzzle brake. Browning does not include a scope mount, rings, or any form of optic, nor do they provide a lock or a basic cleaning kit, which is standard for rifles at this price point. You must source a scope base separately—the receiver uses a standard #8-40 screw pattern—and torque it to 25 in-lbs.
Is the Browning AB3 worth it at $722.99?
Yes, at $722.99, this rifle represents competent value for a specialized, magnum-caliber hunting tool with a factory-threaded barrel. You are paying for Browning's proven bolt design and a functional camo finish that would cost $200+ to apply aftermarket. The primary compromise is the 3-round magazine capacity, which is common for hunting rifles but limits potential use in some states with different regulations. If your primary need is a durable, long-range rifle chambered in a potent magnum cartridge, this is a cost-effective entry point.
Key attributes
| upc | 023614864240 |
| manufacturer | Browning |
| manufacturer part number | 035841229 |
| action | Bolt Action |
| atf type | RIFLE |
| barrel length | 26" |
| caliber/gauge | .300 Winchester Magnum |
| capacity | 3 + 1 |
| color | BLUED |
| length | 53.7000 |
| number of magazines | 1 3 rd. |
| package height | 3.3 |
| package width | 7.4 |
| product type | Rifle |
| safety | Tang |
| shipping weight | 9.1 |
| sights | No |
Frequently asked questions
- Is the muzzle brake removable?
- Yes, the radial muzzle brake is threaded onto the 5/8-24 muzzle threads and can be removed with a 3/4-inch wrench. It will expose the standard 5/8-24 threads for direct attachment of a compatible suppressor or a thread protector, which is included in the box. The brake is torqued to approximately 30 ft-lbs from the factory.
- Does this rifle accept AICS-pattern magazines?
- No, it does not. The Browning AB3 uses a proprietary, single-stack polymer magazine specific to this action. It is not compatible with common AICS-pattern metal magazines. The magazine release is a standard latch on the forward edge of the trigger guard. Spare magazines are available directly from Browning or through retailers like EuroOptic.
- What scope base fits the drilled and tapped receiver?
- The receiver uses a standard long-action Browning pattern with two pairs of #8-40 holes spaced 6.5 inches apart center-to-center. A Weaver-style base (like a #46) or specific Browning-branded base from manufacturers like EGW or Talley will fit. Mounting screws should be torqued to 25 in-lbs using a calibrated driver, not a multi-bit screwdriver.
- Can I shoot .300 Winchester Short Magnum ammo in this rifle?
- No, you absolutely cannot. This rifle is chambered specifically for .300 Winchester Magnum. Attempting to fire a .300 WSM, which is a shorter, fatter cartridge, will result in a dangerous headspace failure and catastrophic case rupture. Always verify the caliber stamping on the barrel and only use ammunition marked '.300 Win Mag' or '.300 Winchester Magnum'.