Magpul(R) PMAG 30 AR 300 B Gen M3 .300 Blackout 30 Round OD Green Polymer Magazine is designed for compatible AR-15 firearms. The magazine features polymer construction with a od green finish and is designed to provide proper fit and dependable feeding in compatible firearm applications.Key Features 30-round magazine capacity Designed for compatible AR-15 firearms Compatible with .300 Blackout Polymer construction OD Green finishMagpul(R) manufactures firearm magazines and related accessories with an emphasis on durable construction compatibility and dependable function. The brand develops products for a variety of firearm platforms and shooting applications. Its products are designed with attention to fit materials and practical performance.