Description
Rock River Arms has been building ARs the right way for decades, and the LAR-15M Elite CAR A4 is a good example of why the brand has such a loyal following. This is a 16 inch carbine chambered for 5.56 NATO, which means it happily runs .223 Remington too, built on forged receivers with a chrome lined chrome moly lightweight barrel. The 1:9 twist stabilizes the most common bullet weights you'll find on store shelves, and the chrome lining adds bore life and makes cleanup a lot less of a chore after a long day of shooting.
What Sets the LAR-15M Elite CAR A4 Apart
Two things stand out here. First is the mid-length gas system. Compared to the carbine-length setup on a lot of 16 inch guns, mid-length gas softens the recoil impulse and is easier on parts, so the rifle shoots smoother and stays flatter between shots. Second is the trigger. RRA installs their own two stage trigger, which gives you a light, clean break that you normally have to pay extra to add to a factory carbine. Combine those with the 1 MOA accuracy guarantee at 100 yards and you've got a carbine that punches above its class on paper targets, not just in a spec sheet.
Rock River LAR-15M Features and Handling
The flat top A4 upper gives you a full length rail up top for a red dot, LPVO, or carry handle, while the A2 front sight base and mid-length handguard keep the classic carbine profile. Furniture is practical stuff: a Hogue rubber grip that stays put in sweaty hands, RRA's 6 position Tactical CAR stock for quick length of pull changes, and a star safety selector. The muzzle wears an A2 flash hider on standard 1/2×28 threads, so swapping to a different device down the road is simple. At 7.7 pounds and 36 inches overall, it balances well and carries comfortably.
Each rifle ships with one 30 round magazine, an RRA hard case, and the manual with warranty information. Whether this is your first AR or an addition to the safe, it's a well sorted carbine from a company that builds them in the USA and stands behind the work.
Key Specifications
- Manufacturer: Rock River Arms
- Model: LAR-15M Elite CAR A4
- Manufacturer Part Number: AR1231
- UPC: 842834108152
- Caliber: 5.56 NATO (also fires .223 Rem)
- Action: Semi-Auto
- Barrel: 16" Chrome Lined Chrome Moly, Lightweight Profile
- Twist Rate: 1:9
- Gas System: Mid-Length
- Muzzle Device: A2 Flash Hider, 1/2"-28 TPI
- Trigger: RRA Two Stage
- Upper/Lower Receiver: Forged A4 Upper / Forged RRA LAR-15M Lower
- Stock: RRA 6-Position Tactical CAR Stock
- Grip: Hogue Rubber Grip
- Capacity: 30 Rounds
- Weight / Overall Length: 7.7 lbs / 36"
What’s Included
- Rock River Arms LAR-15M Elite CAR A4 rifle
- One 30-round magazine
- RRA hard case
- Owner's manual and warranty information
Frequently Asked Questions
Can the LAR-15M Elite CAR A4 shoot both 5.56 NATO and .223 Remington?
Yes. The barrel is chambered for 5.56 NATO, which means it safely handles both 5.56 and .223 Remington ammunition. That gives you flexibility to run whatever quality ammo you can find, whether it's budget range fodder or match loads.
How accurate is the Rock River Arms LAR-15M Elite CAR A4?
Rock River Arms backs this rifle with a 1 MOA accuracy guarantee at 100 yards, which is impressive for a chrome lined carbine. The two stage trigger plays a big part in that, giving you a clean, predictable break that makes it easier to shoot up to the rifle's potential.
Does this rifle come with sights, or do I need an optic?
It has a fixed A2 front sight base, and the flat top A4 upper receiver gives you a Picatinny rail for mounting a rear sight or optic of your choice. Most owners add a red dot or a flip-up rear sight to complete the setup. The full length top rail handles anything from irons to a magnified optic.
What bullet weights work best with the 1:9 twist barrel?
The 1:9 twist is a versatile middle ground that stabilizes the most common bullet weights, roughly 45 to 69 grains, with 55 and 62 grain loads being the sweet spot. That covers the vast majority of factory 5.56 and .223 ammo on the market. Heavier 77 grain match loads are better suited to faster twist barrels.





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