ASC AR 15 5.56 40rd refers to a magazine designed for AR-15 rifles chambered in 5.56x45mm NATO or .223 Remington. ASC (Ammunition Storage Components) is a company known for manufacturing magazines and other firearm accessories.The ASC AR 15 5.56 40rd magazine is designed to hold 40 rounds of ammunition. It typically features a sturdy aluminum construction, which provides durability and lightweight characteristics. Aluminum magazines are commonly used in AR-15 platforms due to their reliability and resistance to deformation.

The 40-round capacity offers an increased ammunition capacity compared to standard 30-round magazines, which can be beneficial in certain shooting scenarios where extended firing is required or when compliance with capacity restrictions is necessary.

It’s worth noting that my knowledge cutoff is in September 2021, and there may have been updates or variations to the ASC AR 15 5.56 40rd magazine since then. To obtain the most accurate and up-to-date information, I recommend visiting ASC’s official website or contacting them directly for specific details on the magazine’s features, availability, and any potential updates.