Valken RMAG Hi-cap Thermold -300rd- single

The Valken 300rd Thermold Hi-cap airsoft magazine is constructed of durable hard polymer material, is lightweight, and can take a beating. This high-capacity airsoft magazine fits most M4 or M16-style airsoft rifles and holds 300 BBs. This AEG magazine also comes with a high-quality spring and clutch system to ensure smooth feeding. You can find these airsoft magazines in black or tan colors.