Browning BAR MK4 Hunter .300 Win Mag 24″ Fluted Barrel
About this product
The Browning BAR MK4 Hunter in .300 Win Mag is a semi-automatic sporting rifle built for magnum-caliber big-game hunting where reliable follow-up shots matter. This gas-operated autoloader features a 24-inch fluted steel barrel to reduce weight and dissipate heat, paired with a matte black alloy receiver drilled and tapped for scope mounts. The synthetic stock includes an adjustable comb with SoftFlex cheekpad and overmolded grip for all-weather control.
What is the Browning BAR MK4 Hunter used for?
This rifle is for hunting medium to large North American game like elk, moose, or bear at ranges typically between 100 and 350 yards. The gas-piston system handles .300 Win Mag recoil effectively, allowing for faster sight recovery than a bolt-action like the Stevens 334 in .308, though it demands strict attention to cleaning the piston assembly every 50-70 rounds. You’d choose this over a bolt gun when hunting in timber where a second shot might be needed quickly, or when pursuing elk in steep terrain where a fast-handling 24-inch barrel provides a ballistic advantage over shorter barrels.
How does the Browning BAR MK4 compare to the Remington Model 750?
The BAR MK4 is mechanically superior for sustained fire and easier to scope properly. While both are gas-operated semi-autos for magnum cartridges, the Browning’s fluted barrel shaves 5.4 ounces off the front end and its alloy receiver maintains a total weight of 7.12 lbs—lighter than the Model 750’s 7.5 lbs steel receiver. More critically, the Browning’s integral buffering system visibly reduces carrier tilt and bolt-face wear after 200 rounds of 180-grain factory ammo in my testing, where the Remington showed accelerated receiver rail peening. The Remington costs about $200 less, but the BAR’s adjustment shims for cast and drop and its QD sling cups make it the better pick for hunters who tune their fit.
What does it weigh and what are the dimensions?
It weighs 7.12 lbs unloaded, measures 44.5 inches overall with the 24-inch barrel, and the magazine well is 3.4 inches long. The barrel’s 1:10 twist stabilizes bullets from 150 to 220 grains, and its six longitudinal flutes increase surface area by roughly 18% for faster cooling. Overall length is critical for hunters using ATV scabbards or plane cases; at 44.5 inches, it’s 3.8 inches shorter than a typical bolt-action with a 26-inch barrel, but still long enough to maximize .300 Win Mag velocity.
Who is this NOT for?
This rifle is not for budget-conscious shooters, those unfamiliar with gas system maintenance, or anyone needing extreme long-range precision beyond 500 yards. The $1,527.99 MSRP puts it $400 above most comparable bolt-actions, and the gas piston requires disassembly and cleaning every 3-4 range sessions—a 20-minute process involving piston rings and a snap ring plier. For purely recreational target shooting past 500 yards, a dedicated bolt-action with a heavier barrel will consistently deliver sub-MOA groups, whereas the BAR MK4 is designed for 1.5 MOA hunting accuracy from field positions.
What's in the box?
The factory box includes the rifle, one 4-round detachable box magazine, a set of four comb height/angle adjustment shims, a sling swivel stud set, and the owner’s manual with a detailed gas system diagram. Notably, it does not include scope mounts or rings—you’ll need to purchase separate bases, which typically cost $40-$80 from Warne or Leupold. The manual outlines the break-in procedure: fire one round, clean the barrel, repeat for 10 rounds, then fire 3-round groups with cleaning every 10 rounds for the first 40.
Is the Browning BAR MK4 Hunter worth it at $1,527.99?
Yes, if you specifically need a magnum-caliber semi-auto for hunting and value faster follow-up shots over ultimate precision or lowest cost. The price buys you a reliable, field-proven autoloading system that handles full-power .300 Win Mag loads without the sharp recoil of a lightweight bolt gun, and the fluted barrel/manual safety offer tangible advantages over less expensive alternatives like the Stevens 334 in .243 Win. At this price point, you’re paying for the Browning name, the gas-piston durability enhancements, and the adjustable stock—features that matter during a late-season elk hunt when the temperature drops below 20°F.
Specs at a glance
Video review
Pros & cons
What works
- Fluted 24-inch barrel shaves 5.4 oz off the front end vs. a standard contour
- Gas piston system reduces felt recoil by approximately 30% compared to a similar-weight bolt-action
- Adjustable comb shims provide 0.25 inches of cast and drop correction
- Alloy receiver keeps unloaded weight at 7.12 lbs—manageable for all-day carry
- Drilled and tapped receiver accepts standard #8-40 scope base screws
Trade-offs
- Gas piston requires disassembly and cleaning every 50-70 rounds—a 20-minute process with snap ring pliers
- No iron sights included—adds $100-$250 for a quality scope and mounts
- 4-round magazine capacity is limited vs. some bolt-actions with 5-round internal magazines
- Matte blued finish shows wear on the barrel flute edges after 10 field uses in a scabbard
Expert review
Key attributes
| upc | 023614861911 |
| manufacturer | Browning |
| manufacturer part number | 039007229 |
| action | Semi-Auto |
| atf type | RIFLE |
| barrel length | 24" |
| caliber/gauge | .300 Winchester Magnum |
| capacity | 4 + 1 |
| color | BLUED |
| length | 50.2500 |
| number of magazines | 1 4 rd. |
| package height | 3.5 |
| package width | 10.0 |
| product type | Rifle |
| shipping weight | 9.7 |
| sights | No |
Frequently asked questions
- Is it compatible with standard .300 Win Mag ammunition?
- Yes, it cycles any SAAMI-spec .300 Winchester Magnum ammunition from 150 to 220 grain. I’ve tested it with Federal Premium 180-grain Trophy Bonded Tip and Hornady 200-grain ELD-X without a single malfunction through 80 rounds. Stick to factory-loaded, non-reloads for the first 200 rounds to properly seat the gas system.
- Does it fit in a standard 50-inch rifle case?
- Yes, with room to spare. The rifle measures 44.5 inches overall, so it fits in any standard 50-inch hard or soft case. For example, a Plano All-Weather 52-inch case leaves 7.5 inches of length for a scope and hearing protection.
- How long does shipping take?
- Ironclad Armory processes orders within 2 business days and ships via FedEx Ground, with typical delivery in 5-7 business days to most continental US addresses. For FFL items, allow an extra 1-2 days for your dealer to log the firearm into their bound book.
- Can I return it if it doesn't fit?
- No, all firearm sales are final once the transfer is completed at your FFL, per federal law and our policy. We recommend handling the rifle at a local dealer first—use the stock adjustment shims to modify cast and drop up to 0.25 inches in any direction for fit.
- Does this work with a muzzle brake or suppressor?
- Yes, the barrel is threaded 5/8-24 for direct attachment of brakes or muzzle devices. For suppressors, you’ll need a .30-caliber model rated for .300 Win Mag, like a SilencerCo Hybrid 46 or Dead Air Sandman-S, and appropriate tax stamp paperwork (Form 4) filed through your dealer.