Guide

    Browning BAR MK3 .300 Win Mag 24" Review & Specs (MPN 031047229, UPC 023614439721)

    Browning BAR MK3 .300 Win Mag 24" (MPN 031047229) Review & Specs

    Introduction

    If you’re looking for a hard-hitting, big-game-capable semi-auto that still handles like a traditional hunting rifle, the Browning BAR MK 3 .300 Win Mag 24" stands out for one core reason: it pairs magnum-class energy with Browning’s proven gas-operated BAR action—giving you fast, controlled follow-up shots without the manual cycling demands of a bolt gun.

    Chambered in .300 Winchester Magnum and built around the BAR MK 3 platform, this configuration (UPC 023614439721, MPN 031047229) is aimed squarely at hunters who may need a second shot quickly—whether that’s a bull elk stepping into an opening, a bear turning into thick timber, or a hog that won’t stop moving.

    Key Features and Specifications

    Below are the most decision-relevant specifications and platform features to understand before you buy.

    Verified model identifiers

    • Manufacturer: Browning
    • Model/Platform: BAR MK 3
    • Chambering: .300 Win. Mag.
    • Barrel length: 24 in
    • UPC: 023614439721
    • MPN: 031047229

    Capacity and feeding system

    • Magazine capacity: 3+1 in .300 Win. Mag. (3 rounds in the magazine plus 1 in the chamber). (browning.com)

    This is a key point for the BAR MK 3 hunting variants: capacity is typically optimized for hunting regulations and a flush, field-friendly profile.

    Action design (why the MK 3 matters)

    The BAR MK 3 is a gas-operated, semi-automatic hunting rifle designed to cycle reliably while smoothing recoil impulse compared to many similarly chambered rifles.

    Notable MK 3 design elements highlighted by Browning include:

    • Seven-lug rotating bolt that locks into the barrel for robust lockup.
    • A rigid action bar/inertia block intended to help reduce barrel vibration (supporting practical hunting accuracy).
    • An internal buffering system designed to reduce wear and stress on moving parts over time. (browning.com)

    Barrel length benefits in .300 Win Mag

    A 24-inch barrel is a practical sweet spot for .300 Win. Mag.

    • It helps the cartridge deliver more complete powder burn and stronger velocity potential than shorter barrels.
    • It keeps the rifle from becoming excessively long for woods hunting, especially compared to longer 26-inch magnum setups.

    Optics readiness

    BAR MK 3 rifles are commonly set up for hunting optics (drilled/tapped receivers are typical across the line; some variants include rails). Because exact configuration details can vary by sub-model, confirm the included mounting interface on the specific SKU/variant you’re purchasing.

    Safety, ammo standards, and maintenance expectations

    From a best-practices standpoint, Browning’s BAR MK 3 owner’s manual emphasizes:

    • Follow safe handling procedures and never rely solely on mechanical safeties.
    • Use SAAMI-approved ammunition (important in a semi-auto magnum where pressure consistency and cartridge dimensions matter).
    • Avoid unauthorized modifications to the firing mechanism; use of aftermarket components is at the user’s risk. (browning.com)

    Practical Applications

    The Browning BAR MK 3 .300 Win Mag 24" is best understood as a “do the hard work for you” hunting rifle: it’s built to stay on target, cycle smoothly, and deliver magnum downrange authority.

    1) Elk, moose, and large-bodied game

    .300 Win. Mag. is widely chosen for larger North American game because it carries energy well at practical field distances and supports a broad range of bullet weights suitable for deep penetration and controlled expansion.

    Where the BAR MK 3 adds value is in speed and continuity:

    • In timber, openings can be brief.
    • If the first shot lands slightly off perfect due to angle, movement, or wind read, the rifle’s semi-auto cycling can help you stay in the scope and correct quickly.

    2) Bear and hog hunting in thick cover

    Browning specifically positions the BAR MK 3 as a strong choice when follow-up shots may be needed quickly in dense cover. (browning.com)

    For bears and hogs, the practical benefits are:

    • Faster second shot potential without breaking cheek weld.
    • Less disruption to sight picture compared to cycling a bolt under stress.
    • The gas system’s recoil characteristics can reduce “getting rocked” by magnum recoil—especially helpful when shooting from imperfect field positions.

    3) “One rifle” for mixed terrain hunts

    If you hunt a mix of:

    • dark timber,
    • clear-cuts,
    • ridgelines,
    • and fields,

    a 24" .300 Win. Mag semi-auto can be an effective generalist—especially when you prioritize a fast, clean follow-up shot over ultra-lightweight mountain-rifle minimalism.

    Expert Analysis

    From a product-selection standpoint, this model is most compelling for hunters who want magnum performance but don’t want to accept the typical tradeoffs of a lightweight bolt gun (sharper felt recoil, slower follow-ups, and more shooter-induced movement during cycling).

    What the BAR MK 3 tends to do well

    • Controlled recoil impulse (for a magnum): Gas operation generally spreads the recoil over time versus a fixed-breech action.
    • Fast follow-up shots: The rifle cycles, chambers, and returns to battery without you running the bolt.
    • Field-friendly capacity: The 3+1 setup in .300 Win. Mag aligns with many hunting rules and keeps the rifle streamlined. (browning.com)

    What to consider before choosing it

    • Weight vs. stability: Semi-auto hunting rifles commonly weigh more than comparably configured bolt guns. That can be a benefit (steadier hold, softer recoil) but a cost on long climbs.
    • Ammo selection matters more in semi-autos: Stick to reputable, SAAMI-spec hunting loads and confirm reliable cycling before the hunt. Browning’s manual specifically calls out SAAMI ammunition standards and safe handling practices. (browning.com)
    • Accessory/aftermarket caution: Avoid unvetted modifications. In a gas-operated magnum, small changes can have outsized reliability consequences.

    Pricing and availability (how to verify today)

    Because retail pricing and in-stock status change constantly by region and season, the most honest approach is:

    • Treat any single price point you find online as a snapshot, not a guarantee.
    • Confirm with local stocking dealers and (if applicable) current distributor feeds.

    I found a historical “sold/new” price datapoint associated with UPC 023614439721 and MPN 031047229, but it’s from a third-party pricing site and should not be treated as official MSRP or current market pricing. (Given your source restrictions and the fact that it is not a manufacturer/government/testing-organization source, I’m not using it as a cited authority here.)

    Conclusion

    The Browning BAR MK 3 .300 Win Mag 24" (MPN 031047229, UPC 023614439721) is a purpose-built hunting semi-auto for shooters who want:

    • magnum-class capability,
    • a practical 24" barrel length,
    • and the real-world advantage of fast follow-up shots—especially in timber or high-pressure moments.

    If your priority is staying on target and shooting accurately under field stress, this BAR configuration makes a strong case. If your priority is minimum pack weight above all else, a lightweight bolt gun may still win—but you give up the BAR’s semi-auto speed and recoil behavior.

    Sources

    Browning. "BAR MK 3 Rifle Owner’s Manual (17-BFA-277)." Browning. 2019. https://www.browning.com/content/dam/browning/support/owners-manuals/2019/17-BFA-277_BAR_MK3_OM_WEB.pdf

    Browning. "What’s the Magazine Capacity of the BAR?" Browning Support FAQ. (Accessed 2026). https://www.browning.com/support/faq/bar-magazine-capacity.html

    Browning. "BAR Rifle Collection" (Browning’s BAR Collection article). Browning News. 2025 (site-published). https://www.browning.com/news/articles/rifles/bar-rifle-collection.html