Rock River Arms LAR-15 5.56 NATO, 16 in Stainless Heavy Barrel, Free-Float, A4 Flat-Top, 4x 40-Round Magazines
This Rock River Arms LAR-15 pairs a 16-inch stainless heavy-profile barrel with a round free-float handguard and an A4 flat-top upper. It features a large side-port muzzle brake, a low-profile gas block with a short top rail and fixed sling loop, and a T-marked Picatinny upper (T2–T12 visible). The rifle comes with four 40-round magazines and is in very good condition with an excellent bore.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Details: Minor handling marks are present from previous use. The bore presents a reflective interior under light. Please refer to the photos for a complete view of the condition.
What’s Included
- Rock River Arms LAR-15 5.56mm NATO rifle
- 4x 40-round AR-15 pattern magazines (extended-length, curved, metal bodies)
The stainless steel heavy-profile barrel is free-floated for consistent performance and capped with a large side-port muzzle brake. It is threaded and set up with a round textured free-float handguard that provides a secure grasp without added bulk.
The A4 flat-top upper features a T-marked Picatinny rail (T2–T12 visible) for precise rail reference. A forward assist, ejection-port cover, and case deflector are present, and the charging handle is Rock River Arms-marked.
A low-profile gas block includes a short section of top rail and a fixed sling loop. The rifle is configured without installed sights, allowing the user to choose their preferred aiming setup.
The carbine wears a 6-position collapsible stock and a rubber finger-groove pistol grip (Hogue-style) for a stable hold. Operation is semi-automatic with a direct-impingement system and a manual safety. Finish is matte black anodized on the receiver with overall black furniture.
Capacity is 40+1 with the included extended magazines. Four metal-bodied 40-round magazines are provided, offering extended runtime and reduced reload frequency.



