The MAG 30-Round Polymer .223/5.56x45 Magazine is compatible for AR15/M4/M16 and designed to provide high-quality economical functionality. - Our Magazine is a high-quality efficient firearm accessory that provides top-of-the-line standards. The MAG polymer magazine gives flawless functionality. Its contoured interior prevents jamming and misfeeds by keeping individual rounds in the proper position. The MAG 30-round .223/5.56x45 magazine is compatible for AR15/M4/M16 and offers impact resistance stainless steel spring and an anti-tilt follower with 100% reliability. - Highly-impactful polymer made also with smash resistance - Corrosion resistant with a stainless steel spring - Lightweight and rustproof compatible - Noise reduced with a textured gripping surface - 100% authenticity with a non-tilting follower - Equipped to fit securely with our magazine coupler