Rock River Arms LAR-15 A4 5.56 NATO, 16-inch, Flat-Top AR-15 with SIG ROMEO5 Red Dot & Streamlight HL-X
This Rock River Arms LAR-15 A4 brings a proven AR-15 platform together with practical upgrades. It features an A4 flat-top upper with a T-marked Picatinny rail, a 16-inch carbine-profile threaded barrel with an A2-pattern flash suppressor, and a carbine-length gas system. It comes outfitted with a SIG SAUER ROMEO5 red dot, a Streamlight ProTac Rail Mount HL-X weapon light, an aftermarket quad-rail handguard with a vertical foregrip, and coupled 30-round polymer magazines. The bore is excellent, and the rifle bears Colona, Illinois roll marks. The LAR-15 line is noted for law-enforcement adoption following a 2003 DEA contract.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are significant handling marks and evidence of heavy prior use. Please review the photos for a clear view of surface wear and finish marks.
What's Included
- Rock River Arms LAR-15 A4 5.56mm rifle
- SIG SAUER ROMEO5 red dot sight (installed)
- Streamlight ProTac Rail Mount HL-X weapon light (installed)
- Vertical foregrip (installed)
- Flip-up rear backup sight (installed)
- Sling
- Two polymer 30-round magazines with magazine coupler (brand not confirmed)
The A4 configuration provides a flat-top receiver with a T-marked Picatinny rail for straightforward optic placement. It includes a forward assist, case deflector, and ejection-port dust cover. The 16-inch carbine-profile barrel is threaded and capped with an A2-pattern flash suppressor, and the carbine-length gas system complements the direct-impingement, rotating-bolt action.
Upgrades center on practical utility: an aftermarket carbine-length quad-rail handguard, a vertical foregrip, and a Streamlight ProTac Rail Mount HL-X weapon light. A SIG SAUER ROMEO5 red dot sight is installed, and the setup is backed by an A2-type fixed front sight and a flip-up rear backup sight.
The rifle wears a Rock River Arms-marked 6-position collapsible polymer stock with a rear sling loop for carry or support, paired with a rubberized finger-groove pistol grip for a secure hold. Length of pull is listed at 14.0 inches.
Magazine capacity is 30+1, and the included two 30-round polymer magazines are coupled together for rapid changes. The magazine brand is not confirmed.
Manufacturer roll marks show Colona, Illinois. The LAR-15 series has a professional pedigree, with the line noted for law-enforcement adoption following a 2003 DEA contract.