Make: Rock River Arms

Model: LAR-15M

Serial Number: SM200045

Year of Manufacture: ATF Classification: Modern

Caliber/Gauge: .300 AAC Blackout

Action Type: Semi automatic, direct impingement

Barrel Length: 16" 1:8 twist

Sights/Optics: The front sight is an F-marked A2 sight. The rear sight is a flip up MAGPUL MBUS sight. There are two Yankee Hill mini picatinny risers mounted atop the receiver.

Grip/Stock Configuration & Condition: The forend is a two piece clamshell handguard with internal heat shields. The stock is a MAGPUL ACS collapsible stock. The pistol grip is a Hogue grip with Rock River markings. The safety selector is Rock River's proprietary selector. The milspec charging handle has an extender on the release. The furniture shows very light handling wear. There are no chips or cracks. This furniture rates in Fine Plus to Excellent condition.

Type of Finish: Matte black

Finish Originality: Original

Bore Condition: The bore is bright and the rifling is sharp with some light fouling. There is no erosion in the bore. In this writer's opinion, the bore rates 9.5/10.

Overall Condition: This rifle retains about 99% of its metal finish. There are only a few minor scratches and rub marks present. The Gemtech muzzle device has some carbon buildup from operation. The pins are unmarred and remain fully functional. The markings are clear and complete. Overall, this rifle rates in about Fine+ condition.

Mechanics: The action functions correctly. We did not fire this firearm. As with all used firearms, a thorough cleaning may be necessary to meet your maintenance standards.

Box, Paperwork & Accessories: Rock River hard case

Our Assessment: This rifle presents in solid overall condition, retaining approximately 99% of its original matte finish. The exterior surfaces are clean and evenly preserved with minimal handling evidence, and the 16" barrel gives the rifle a balanced, versatile profile well suited to the .300 AAC Blackout cartridge. Overall presentation is crisp and professional, reflecting careful use and storage.

Mechanically, the rifle is strong. The bore rates 9.5 out of 10 with bright steel and sharp rifling, indicating light use. The action functions correctly with smooth cycling and proper lockup, consistent with Rock River Arms' reputation for solid assembly and reliability. The .300 AAC Blackout chambering offers flexibility across a wide range of bullet weights and applications while maintaining standard AR ergonomics.

As a modern LAR-15M with excellent finish retention, a high quality bore, and correct mechanical operation, this rifle stands as a clean and capable example of Rock River Arms' contemporary AR platform in a popular modern chambering.