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Colt LE-901 Modular Multi-Caliber AR: A Well-Designed Failure

Colt LE-901 Modular Multi-Caliber AR: A Well-Designed Failure

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Published on October 29, 2025
Duration: 14:15

This video analyzes the Colt LE-901 Modular Multi-Caliber AR rifle, highlighting its design origins for the US Army SCAR program. The rifle aimed to offer 7.62x51mm and 5.56x45mm compatibility with modular upper receivers, a mechanically clever but ultimately unsuccessful approach. The review discusses its failure to secure a military contract and its subsequent lack of commercial success due to the inherent trade-offs of modularity over dedicated firearms. It also mentions a batch acquired by San Bernardino County law enforcement and its availability on the commercial market.

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