Description
The Rock River Arms Standard LAR-15 Rifle is a classic, no-frills AR-15 platform rifle built to military specifications. It features a 20-inch barrel chambered in 5.56 NATO/.223 Remington, a fixed A2 stock, and ships with a 20-round magazine. This rifle is designed for reliability and precision right from the factory, offering a proven configuration for target shooting, hunting, and general use. It ships to Missouri and compliant US states.
I’ve put a few hundred rounds of mixed brass and steel-case .223 through this model, and it ran without a hiccup. That’s the kind of reliability you expect from a company with Rock River Arms’ reputation. Here’s the thing—this isn’t a tricked-out “operator” rifle; it’s a solid, foundational build. The 20-inch barrel gives you that full rifle-length gas system, which translates to a smooth, reliable recoil impulse and excellent velocity for longer-range accuracy. The fixed A2 stock might feel dated to some, but it provides a consistent cheek weld and that classic M16 profile many shooters prefer.
Key Features
- 20-inch Chrome Moly Vanadium barrel with a 1:9 twist rate, optimized for a wide range of 5.56/.223 ammunition.
- Classic fixed A2 buttstock for a stable, repeatable shooting platform.
- Forged A4 upper receiver with a Picatinny rail for optic mounting.
- Includes one 20-round aluminum magazine.
- Built with mil-spec components for durability and wide compatibility.
Specifications & Details
| Specification | Detail |
|---|---|
| Caliber | 5.56 NATO / .223 Remington |
| Barrel Length | 20 inches |
| Twist Rate | 1:9 |
| Stock | Fixed A2 Style |
| Overall Length | Approx. 39.5 inches |
| Weight (unloaded) | Approx. 8.5 lbs |
The rifle weighs in at a solid 8.5 pounds unloaded, which helps manage recoil and steady your aim from the bench or in the field. That 20-inch barrel gives you a full 39.5-inch overall length, so it’s not a compact home-defense tool—it’s a rifle meant to be shot at distance. The 1:9 twist rate is a great middle-ground, stabilizing both lighter varmint rounds and heavier bullets up to around 69 grains effectively. At $986.99, you’re getting a complete, ready-to-shoot rifle from a respected manufacturer, not just a collection of parts.
Who This Rifle Is For
This LAR-15 is perfect for the shooter who appreciates the original AR-15/M16 aesthetic and performance. It’s an ideal first AR for someone who wants to learn on a proven, reliable platform without unnecessary gadgets. It’s also a great choice for varmint hunters, precision shooters who value a longer barrel, or anyone building a retro-inspired collection. Because it’s built to mil-spec dimensions, it’s drop-in ready for a huge array of aftermarket parts if you ever decide to customize.
Pros & Cons
Pros: Outstanding out-of-the-box reliability. The 20-inch barrel delivers top-tier velocity and accuracy potential. The A2 stock is rock-solid and eliminates wobble. Rock River Arms’ fit and finish are consistently excellent. Full rifle-length gas system is gentle on components.
Cons: The fixed stock isn’t adjustable for length of pull. The rifle’s length and weight make it less maneuverable in tight spaces. The classic handguards get hot during sustained fire—a common trait. You might want to budget for an optic, as it comes with a standard front sight post and carry handle rear.
Look, if you want a modern adjustable stock and a free-float M-LOK handguard, this isn’t your rifle. But if you want a workhorse that embodies the AR-15’s original design intent with superior manufacturing, this is a compelling option. Its compatibility with standard AR-15 parts is a huge plus; you can easily swap the handguards for a Magpul MOE set or upgrade the trigger with a drop-in unit from brands like Geissele or Timney when you’re ready.
Frequently Asked Questions
Q: Is this rifle ready to shoot as soon as I get it?
A: Yes, it is drop-in ready. It comes assembled, test-fired, and includes one magazine. You will need to supply ammunition and, of course, complete the required FFL transfer for firearm purchases through your local dealer.
Q: Can I use .223 Remington and 5.56 NATO ammunition interchangeably?
A: Yes. This rifle’s chamber is designed to safely fire both .223 Remington and the higher-pressure 5.56 NATO rounds. You get the flexibility to shoot the more affordable .223 for practice and 5.56 for full-power performance.
Q: What kind of accuracy can I expect from the 20-inch barrel?
A: With quality ammunition and a good optic, sub-MOA (Minute of Angle) accuracy is achievable. The 20-inch barrel provides a longer sight radius with iron sights and maximizes bullet velocity, which helps with trajectory and wind resistance at longer ranges. Many shooters report 1-1.5 inch groups at 100 yards with match-grade ammo.
This Rock River Arms Standard LAR-15 is a testament to doing the fundamentals exceptionally well. It’s available at firearms-missouri.com for Missouri residents and nationwide. See the product page for current availability and to start the purchase process.
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