PTS ENHANCED POLYMER MAGAZINE SHORT (EPM1 S) Color:Tan They also have an integrated Color:Dark Blue They also have an integrated safety valve to release pressure automatically to reduce explosion risk whenever the pressure exceeds a safety level due to temperature or other reasons 3 months Manufacturer`s limited Warranty for defective items (excluding items damaged and or misused after receipt) the EPM1 shell is made with Dupont Zytel® polymer which makes it extremely durable and strong It is also significantly slimmer than the first generation EPM’s so stacking the magazines in pouches or during storage takes up less space than before