Magpul(R) PMAG 20 AR/M4 Gen M3 5.56x45 NATO 20 Round OD Green Polymer Magazine is designed for compatible AR-15/M4 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 20-round magazine capacity Designed for compatible AR-15/M4 firearms Compatible with 5.56x45 NATO 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.