Rock River Arms LAR-15 5.56 NATO Semi-Auto AR-15 with 18 inch Stainless Heavy Barrel, Free-Float Rail, Threaded with Multi-Port Brake, 30+1
This Rock River Arms LAR-15 stands out with its 18 inch stainless heavy barrel, a threaded muzzle capped by a multi-port brake, and a robust free-float aluminum handguard. It features a continuous T-marked flat-top rail and accessory rail segments for mounting flexibility, paired with a 6-position RRA collapsible stock and rubber finger-groove grip. Built on aluminum alloy receivers and made in the USA, it delivers a solid, purpose-built AR-15 configuration in 5.56 NATO.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are minimal markings from previous handling and use.
What’s Included
- Original case
- 2x 30-round magazines
The 18 inch stainless heavy barrel is built for durability and consistency, and the threaded muzzle arrives with a multi-port brake/compensator featuring a crenellated front. The direct impingement system and low-profile gas block sit under the handguard for a clean profile.
The free-float aluminum handguard is ventilated and includes a full-length top Picatinny rail. The flat-top upper is T-marked from T2 to T12, and short accessory rail segments are positioned at 3, 6, and 9 o'clock.
Controls and furniture are set up for practical use, including a manual safety selector, an RRA-marked 6-position collapsible carbine stock, and a rubber finger-groove pistol grip. The aluminum alloy receivers wear a matte black finish that contrasts cleanly with the stainless barrel.
Chambered in 5.56mm NATO, this LAR-15 uses STANAG/AR-15 pattern magazines and has a 30+1 capacity. It ships with two 30-round magazines and is manufactured in the USA.




