Echo 1 E90 High Capacity Box magazine allows you to use your favorite M4 Magazines to fill up the reservoir and use them as an extension. It holds 1500-2000 BB's depending on what brand and weight. Works with all High Capacity M4 magazines.
Works with these known brands of P90:
Echo 1 USA
- ManufacturerEcho1 USA Airsoft
- Accessories TypeAirsoft Magazines/Clips
- Warranty30 Day Limited