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













