Rock River Arms LAR-15M | .300 AAC Blackout | SBA3 Brace

The Rock River Arms LAR-15M (BLK2132) is a semi-automatic .300 AAC Blackout platform built for compact, short-barrel utility. It ships with an SB Tactical SBA3 arm brace and a Hogue rubber grip for consistent handling. The design emphasizes modularity with an M-LOK compatible handguard and an aluminum Picatinny-style receiver for accessory mounting. For optics, a rugged low-power variable such as the Vortex Strike Eagle 1-6×24 pairs well for close-to-medium engagements on a compact .300 Blackout platform.

Common applications include precision work at short to medium ranges and field use where compact handling and cartridge performance are desired.

Product Specifications

• The manufacturer is Rock River Arms.
• The model designation is LAR-15M (BLK2132).
• The caliber is .300 AAC Blackout.
• The action type is Semi-Auto.
• The capacity is 30 + 1.
• The handguard is described as M-LOK compatible.
• The receiver is described as black aluminum with Picatinny-style rail.
• The arm brace is SB Tactical SBA3, black polymer.
• The grip material is black Hogue rubber.
• The overall length is 24 inches.
• The listed weight is 5.20 lbs.
• The listed weight range is 5 lbs to 5.99 lbs.
• The safety is listed as lever action.
• The stock material is polymer with a black finish.
• Included accessories are magazine, case, keyed cable lock, manual and warranty information.
• The UPC is 842834125401.

The LAR-15M offers a compact, feature-focused package for users who want an AR-style platform in .300 AAC Blackout with accessory-ready ergonomics. The SBA3 brace and M-LOK handguard accommodate a range of optics and attachments while the aluminum receiver provides a stable platform for sights. This configuration is practical for short-barrel field tasks and precision work at close to moderate distances; it suits shooters who prioritize modularity and control in a compact form factor.

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