Rock River Arms LAR-15M Assurance-C Carbine — 5.56×45mm NATO, 16", 30+1 — Black, RRA Operator Stock & Hogue® Grip, Carrying Case (AR1900 | UPC 842834100880)

Dependable, accurate, and duty-ready—the Rock River Arms LAR-15M Assurance-C Carbine is a no-nonsense 5.56 that blends proven AR-15 engineering with Rock River’s quality control and field-smart ergonomics. The heart of the rifle is a 16" barrel paired with a free-float handguard (model/configuration dependent) and a tuned gas system for smooth cycling and consistent performance. Outfitted with the RRA Operator Stock for a solid cheek weld and a grippy Hogue® pistol grip, the 30+1 Assurance-C (model AR1900) ships in a carrying case—so you can go from counter to range with confidence.

Why Choose the LAR-15M Assurance-C?

• Battle-Proven Caliber: Chambered in 5.56×45mm NATO, the Assurance-C also runs .223 Remington (with appropriate ammo), giving broad ammunition flexibility for training, defense, and ranch duty.

• Reliable 16" Carbine Length: The classic barrel length delivers dependable velocity, manageable recoil, and quick handling—ideal for home defense, patrol, and general-purpose carbine work.

• Rock River Build Quality: Tight receiver fit, quality barrel extension, and attention to detail result in repeatable lock-up and practical accuracy with common 55–77gr loads.

• Ergonomic Advantage: The RRA Operator Stock offers multiple length-of-pull settings and a stable cheek weld, while the Hogue® grip provides traction in rain, sweat, or gloves.

• Range-Ready Package: Arrives with a carrying case—just add optics/irons and zero.

Note: Specific handguard type, muzzle device, and trigger configuration may vary by production lot or distributor. Confirm current specifications with your retailer.

Key Features & Specifications

• Model: LAR-15M Assurance-C Carbine

• Part Number: AR1900

• UPC: 842834100880

• Caliber: 5.56×45mm NATO (accepts .223 Rem)

• Capacity: 30+1 (STANAG-pattern magazines)

• Barrel: 16" steel, threaded muzzle (verify thread pitch/muzzle device)

• Upper/Lower: AR-15 pattern aluminum receivers, black finish

• Stock: RRA Operator Stock (adjustable LOP; cheek-friendly design)

• Grip: Hogue® overmolded pistol grip

• Handguard: Free-float (M-LOK®/rail style depends on configuration)

• Trigger: Mil-spec or enhanced (varies by lot)

• Included: Carrying case; magazine(s)/accessories may vary by distributor

Performance You’ll Notice

• Smooth, Trackable Impulse: The 16" system and proper gas tuning help keep the sight picture stable for faster follow-ups.

• Practical Accuracy: From 50-yard drills to 300-yard steel, expect consistent groups with quality training and defensive ammunition.

• Reliable Cycling: Built to run across a range of 5.56/.223 loads with proper lubrication and magazines.

Ideal Use Cases

• Home & Property Defense: Quick handling, reliable chambering, and accessory-ready layout.

• Training & Carbine Courses: Durable components that thrive under high round counts and daily dry-fire.

• Ranch/Truck Rifle: Weather-resistant finish and trusted 5.56 ballistics for everyday utility.

• General-Purpose Carbine: A flexible platform ready for optics, white lights, slings, and mission-specific accessories.

Optics & Accessory Pairings

• Optics: Red dot or LPVO (1–6× / 1–8×) for speed with reach; confirm mount height for your preferred cheek weld.

• Muzzle Device: Flash hider, comp, or brake (verify thread pitch); re-zero after installation.

• White Light & Sling: Add a quality light on the free-float handguard and a two-point QD sling for positional stability.

• Magazines: Use reputable STANAG mags (PMAG®, Lancer®, USGI) and rotate duty mags to preserve spring life.

Setup Tips (Non-Instructional)

1. Zero Smart: Start with a 50/200 or 100-yard zero, then confirm at intermediate distances for accurate holds.

2. Ammo Testing: Try 55–62gr for training and evaluate 62–77gr OTM/defense loads for your chosen application.

3. Torque & Witness: Torque optic mounts and critical fasteners to spec; add paint-pen marks for quick checks.

4. Maintenance Rhythm: Keep the BCG lubricated during long range days; inspect gas-block and handguard fasteners periodically.

Care & Maintenance

• Bore/Chamber: Clean with quality solvent and patches; protect the crown and feed ramps.

• Bolt Carrier Group: Lube generously for classes and cold-weather reliability; inspect gas rings and extractor tension as part of your routine.

• Hardware Audit: Re-verify optic, muzzle device, and handguard screws after your first high-round-count session.

What’s in the Box*

• Rock River Arms LAR-15M Assurance-C Carbine (5.56 NATO)

• Carrying case

• Owner’s manual; magazine(s)/lock/accessories vary by distributor
  *Always confirm the exact bill of materials with your retailer.

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Rock River Arms LAR-15M Assurance-C Carbine — 5.56×45mm NATO, 16", 30+1, Black with RRA Operator Stock & Hogue Grip (AR1900 | 842834100880): a trustworthy, accuracy-minded AR-15 that’s ready for training days, property duty, and home defense—right out of the case.

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