The Amend2 20 round magazine is a sturdy, reliable 5.56x45 NATO (.223 Remington) AR15/M4/M16 magazine made of advance polymer material. It is a light, durable and excellent alternative to the standard M4/M16 USGI aluminum magazine. The 20 round body profile is ideal for added maneuverability and weapon handling.
These 20-round magazines are very good and well worth owning. I wanted to lighten my AR's weight ever so slightly so I purchased 4 magazines which were also on sale. I highly recommend these 556/223 magazines.