The first truly universal loader for rifle magazines. It is made from a durable polymer that will hold up to wear and tear and it fits easily into your range bag or your pocket. This Loader easily loads from an ammo tray” 20 round boxes” or can also be used to load loose ammo. Made in the USA. Compatible with 223 Rem” 5.56 NATO” 300 Blackout” 7.62x39mm” 5.45x39mm and 308 Win ammunition.