Rock River Arms LAR-15M CAR A4 — .300 Blackout, 16", 30+1 — Black, R4 Free-Float Handguard, Tactical Carbine Stock, Overmolded A2 Grip, A2 Front Sight Post (BLK1222 | UPC 842834119646)
Compact power with suppressor-ready manners. The Rock River Arms LAR-15M CAR A4 in .300 Blackout blends proven AR-15 reliability with a purpose-built configuration that excels from home defense to close-range hunting. Anchored by a 16" barrel, a lightweight R4 free-float handguard, and a classic A2 front sight post, this 30+1 carbine (model BLK1222) delivers excellent handling, modern accessory flexibility, and the .300 BLK caliber’s renowned versatility with subsonic and supersonic loads.
Why Choose the LAR-15M CAR A4 in .300 Blackout
.300 BLK Versatility: Run supersonic loads for deer-size game or subsonic for low-signature setups and soft recoil (verify local laws for suppressor use).
16" General-Purpose Barrel: Balances velocity and maneuverability—ideal for hallways, treestands, and truck duty.
R4 Free-Float Handguard: Keeps barrel harmonics consistent for accuracy while giving you M-LOK®/rail real estate (pattern varies by lot) for lights, grips, and sling points.
A2 Front Sight Post: Rugged, always-on iron sighting system; add a rear BUIS or red dot for a fast, reliable sight picture.
Ergonomic Furniture: Tactical Carbine Stock for LOP adjustability and a grippy overmolded A2-style pistol grip for secure control in wet or gloved conditions.
Rock River Arms Quality: Tight receiver fit and careful assembly for dependable cycling across common .300 BLK bullet weights.
Note: Handguard slot pattern, muzzle device, and trigger configuration may vary by production run. Confirm current specs with your retailer.
Key Features & Specifications
Model: LAR-15M CAR A4
Part Number: BLK1222
UPC: 842834119646
Caliber: .300 Blackout (7.62×35mm)
Capacity: 30+1 (uses standard AR-15 STANAG magazines)
Barrel: 16", threaded muzzle (verify thread pitch/muzzle device; commonly 5/8×24)
Gas System: Optimized for .300 BLK (length may vary; check lot specifics)
Handguard: R4 free-float design (M-LOK®/rail options depend on configuration)
Sights: A2 front sight post; rear sight/optic-ready
Stock: Tactical Carbine Stock, adjustable
Grip: Overmolded A2-style pistol grip
Receivers/Finish: AR-15 pattern, black finish
Included: Rifle; accessories and magazine count vary by distributor—verify the box contents
Performance You’ll Notice
Confident Control: Free-float rail + overmolded grip + adjustable stock = stable shooting positions and repeatable cheek weld.
Soft, Trackable Impulse: .300 BLK delivers a push-like recoil, especially with subsonic loads—great for fast follow-up shots.
Reliable Cycling: RRA’s fit/finish and tuned system help maintain function across popular 110–220gr loadings (verify with your specific ammo).
Ideal Use Cases
Home & Property Defense: Compact feel, hard-hitting .30-cal performance, and accessory-ready handguard for light/slings.
Hog & Deer at Woods Distances: Supersonic .300 BLK loads perform well from short-to-mid ranges with proper bullet selection.
Suppressor-Friendly Platforms: Threaded muzzle and .300 BLK’s subsonic loads make for quiet, controllable setups (where legal).
Truck/Ranch Rifle: Durable finish and practical configuration for everyday utility.
Setup & Accessory Ideas
Optics: Pair A2 front with a fixed/rear BUIS and a micro red dot for speed, or choose a 1–6× LPVO for versatility.
White Light: Mount at 3 or 9 o’clock on the R4 handguard; add a remote switch if needed.
Muzzle Device: Flash hider for low signature, or a comp/brake to tighten shot-to-shot recovery; re-zero after installation.
Sling: Two-point QD sling for transitions and stability from barricade or field positions.
Magazines: Quality STANAG mags; mark .300 BLK-only mags to avoid caliber mix-ups with 5.56.
Best Practices (Non-Instructional)
Zero Strategy: Start at 50 yards (common for .300 BLK), then confirm holds at 100–200 yards for both sub and supers.
Ammo Testing: Verify function and POI with your chosen subsonic and supersonic loads; note the shift between them.
Torque & Witness: Mount optics and rail accessories to spec; paint-pen witness marks help catch movement early.
Maintenance Rhythm: Keep the BCG well-lubed for high round counts; inspect gas block and handguard fasteners after the first range session.
Safety & Compliance
Know and follow all federal, state, and local laws regarding rifle features, magazine capacity, ammunition, and suppressor use. Always verify the firearm is unloaded before maintenance or storage and wear proper eye/ear protection.
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Rock River Arms LAR-15M CAR A4 — .300 Blackout, 16", 30+1, Black with R4 Handguard, Tactical Carbine Stock, Overmolded A2 Grip, and A2 Front Sight Post (BLK1222 | 842834119646): a versatile, confidence-inspiring .300 BLK carbine that’s ready for defense, field work, and everyday range use—right out of the box.
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