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Rock River Arms

.450 Bushmaster Rock River Arms

Name: Rock 450B0461 450 BM MID A4 UPR Half SS Upper
Brand: Rock River Arms
SKU: ACC-RRA-450B0461

Rock River Arms is a private American firearms manufacturer based in Colona, Illinois, founded in 1996 by brothers Mark and Chuck Larson, who previously worked at Springfield Armory and co-founded Les Baer Custom. The company initially gained recognition for its hand-fitted custom 1911 pistols, noted for their tight tolerances and precision machining, a tradition that continues in their current 1911 pistols. Rock River Arms expanded into AR-15 style rifles around 2000, with the LAR-15 series becoming a core product line, available in calibers such as .223/5.56 and 6.8 Rem SPC II. Their AR15 rifles are recognized for quality construction, reliability, and features like advanced handguards and billet receivers. The company also produces bolt-action rifles, AR-15 style pistols, and a range of firearm parts and accessories, including magazines. Rock River Arms serves civilian, law enforcement, and military markets, with a reputation for consistent quality and attention to detail across its product lines.

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