The Charles Daly AR 410 Upper is a versatile conversion component that transforms standard AR-15 platforms into .410 bore shotguns. Built around a lightweight aluminum receiver and featuring a 19" steel barrel, this upper assembly weighs just 4.9 pounds and measures 26.75" in overall length. The unit comes complete with adjustable flip-up rear sights and an integrated Picatinny rail system, offering extensive customization options for optics and accessories. This upper receiver's design maintains the familiar ergonomics and controls of the AR platform while providing the unique capabilities of a .410 bore shotgun. This specialized upper conversion unit is engineered with specific compatibility requirements to ensure reliable operation. Designed exclusively for mil-spec lower receivers, the system requires a carbine buffer tube configuration and comes with a specialized buffer that must be paired with a carbine buffer spring for proper cycling. The upper is chambered for 2.5" .410 bore ammunition, with a maximum cartridge length requirement of 2.29 inches for optimal function.