The Warrior Systems W15 is durable, lightweight and extremely reliable AR-15 5.56x45mm NATO aluminum magazine. 
Compact magazine designed for Mil-Spec AR platform Rifles
Offered in 50, 15, and 10 round capacity according to state regulations
Works with most rifles designed to utilize AR-15 5.56x45mm NATO
Constructed of aircraft grade aluminum
Cerakote Finish Options - Armor Black, Flat Dark Earth, Midnight Bronze, and Tungsten Grey
No lubrication required 
Capable of up to 1,100 rounds per minute rate of fire
100% made in the USA