Made in the usa the magpul enhanced self-leveling follower is a drop in replacement for the aluminum usgi 30-round magazine black or green follower.Featuring a patent pending 4-way anti-tilt design for increased feeding reliability the enhanced self-leveling follower is made from a non-hygroscopic and self-lubricating polymer.Caliber: 5.56x45mm NATOFinish: YellowModel: EnhancedMaterial: PolymerModel Fit: AR-15 M4 M16Brand Fit: Magpul