The Magpul PMAG 40 AR/M4 Gen M3 is engineered for optimal performance, delivering reliable and robust access to 40 rounds of 5.56x45 NATO (.223 Remington) ammunition. Constructed from next-generation polymer, this magazine is built to withstand extreme conditions while offering compatibility with a diverse range of platforms, including Colt-spec and non-Colt AR15/M4 variants. Next-generation impact and crush resistant polymer construction Modified dimensions allow for compatibility with non Colt-spec platforms Constant-curve internal geometry for smooth feeding & anti-tilt follower Ribbed gripping surface & aggressive texture for positive handling Elevate your shooting experience with the Magpul PMAG 40 - the ultimate magazine for reliability and performance.