Rock River Arms LAR-15M All-Terrain Hunter – Complete Upper, .223 Wylde, 18" Stainless Heavy Match Barrel, Black Receiver, 13" M-LOK® Handguard, Operate Muzzle Brake

Model/SKU: AR0598.V1 • UPC: 842834101139
Caliber: .223 Wylde (safe for .223 Rem and 5.56 NATO) • Barrel: 18" Stainless Heavy Match • Receiver: Black, optics-ready flat-top • Handguard: 13" Free-Float M-LOK® • Muzzle Device: Operate Muzzle Brake • Type: Complete Upper Assembly (see package contents note)

Upgrade your AR with competition-grade precision and field-ready control. The Rock River Arms LAR-15M All-Terrain Hunter Complete Upper pairs an 18-inch Stainless Heavy Match barrel with a rigid free-float 13" M-LOK® handguard to deliver repeatable accuracy from zero to distance—whether you’re ringing steel, hunting predators, or stretching your dope at the range. Chambered in .223 Wylde, this upper safely runs both .223 Remington and 5.56 NATO while extracting the best accuracy potential from match ammunition. The included Operate Muzzle Brake tames muzzle rise for faster sight recovery and tighter splits, while the flat-top upper provides a continuous rail for LPVOs, red dots, or precision optics.

Why Hunters & Precision Shooters Choose This LAR-15M Upper

• .223 Wylde accuracy advantage: Hybrid chamber geometry enhances precision with .223 match loads while maintaining 5.56 compatibility.

• 18" Heavy Match stainless barrel: Heavier contour improves heat stability, harmonics, and downrange consistency; stainless resists corrosion in harsh weather.

• Free-float 13" M-LOK® rail: Rigid, slim profile protects barrel harmonics and offers flexible mounting for bipods, QD cups, lights, and hand stops.

• Operate Muzzle Brake: Reduces recoil impulse and muzzle climb so you can spot impacts and make faster follow-up shots.

• Optics-ready simplicity: Flat-top receiver with Picatinny rail makes leveling and eye-relief setup straightforward for any glass.

• Rock River Arms quality: Known for clean machining, tight fit, and reliable accuracy that holds up to hard use in the field.

Key Features at a Glance

• Caliber: .223 Wylde (.223 Rem & 5.56 NATO compatible)

• Barrel: 18" Stainless Heavy Match; target crown with Operate Muzzle Brake installed

• Gas System: Tuned for reliable cycling with common .223/5.56 loads (length spec varies by production; optimized for the 18" profile)

• Receiver: A4 flat-top Picatinny, black finish

• Handguard: 13" Free-float M-LOK® with anti-rotation design and full accessory slots

• Finish: Matte/low-glare black receiver; natural stainless barrel

• Model / UPC: AR0598.V1 / 842834101139

• Type: Complete upper (see contents note below)

Performance & Handling

• Consistent groups: Heavy match barrel resists POI shift during extended strings and variable temps.

• Better balance for field use: 18" length splits the difference between velocity and maneuverability—ideal for coyote stands, truck racks, and tripod/prone work.

• Cleaner sight picture: The brake helps keep the reticle on target, improving hit confirmation for solo shooters.

Ideal Use Cases

• Predator & varmint hunting: Flat trajectory with modern .223 match/varmint loads; stable from tripods, barricades, or prone.

• Range & competition: PRS-style gas gun practice, steel matches, and accuracy testing.

• Ranch & property management: Dependable precision for pest control and general utility.

Setup Tips (Get the Most from Your Upper)

1. Torque & threadlocker: Verify rail and muzzle device torque specs; witness-mark screws for quick checks.

2. Optic pairing: A 1-10x/1-8x LPVO or a 2-12x precision scope excels on this platform; confirm mount height for proper cheek weld.

3. Bipod & bag: Add an M-LOK® bipod and rear bag for prone precision; consider QD sling cups for field carry.

4. Zero with your hunting/match load: Note drops and wind holds; record dope on a data card or in your ballistic app.

5. Magazines: Use quality AR-15 mags; mark and rotate for consistency when shooting match ammo.

Package Contents Note: “Complete Upper” configurations from Rock River Arms typically include the barrel, handguard, receiver, gas system, and muzzle device. Bolt carrier group (BCG) and charging handle may vary by distributor—check your retailer’s listing to confirm included parts before purchase.

Specifications (Summary)

• Brand: Rock River Arms

• Series: LAR-15M All-Terrain Hunter

• SKU / UPC: AR0598.V1 / 842834101139

• Caliber: .223 Wylde (.223 Rem / 5.56 NATO)

• Barrel: 18" Stainless Heavy Match, with Operate Muzzle Brake

• Receiver: A4 flat-top Picatinny, black

• Handguard: 13" Free-float M-LOK®

• Type: Complete Upper Assembly

SEO Highlights (What Shoppers Search)

• Rock River Arms LAR-15M All-Terrain Hunter complete upper

• .223 Wylde 18" stainless heavy match barrel upper

• 13" M-LOK handguard Operate muzzle brake

• AR0598.V1 UPC 842834101139

• Precision AR-15 complete upper .223/5.56

Meta Title (SEO)

Rock River Arms LAR-15M All-Terrain Hunter Complete Upper – .223 Wylde, 18" Stainless Heavy Match, 13" M-LOK, Operate Brake | AR0598.V1 | UPC 842834101139

Meta Description (SEO)

Build a precision-ready AR with the Rock River Arms LAR-15M All-Terrain Hunter Complete Upper. .223 Wylde chamber, 18" stainless heavy match barrel, 13" free-float M-LOK handguard, and Operate muzzle brake. Model AR0598.V1, UPC 842834101139.

Structured Data (JSON-LD)

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**Hunt harder and shoot straighter—**the Rock River Arms LAR-15M All-Terrain Hunter Complete Upper delivers the stainless-barrel accuracy, M-LOK flexibility, and recoil control you need to perform in the field and on the clock. The End