Aftermarket aluminum magazine for AR-15 pattern rifles chambered in .223 or 5.56 NATO. These particular magazines feature a 30-round capacity. These fantastic magazines feature a sturdy aluminum body that is incredibly tough and extremely lightweight. These magazines now feature an orange follower, which provides plenty of contrast for the shooter to easily see when they are empty. These particular magazines feature a beautiful gloss black finish. Note: On a dry run here, when the magazines were fully loaded with 30 rounds they did not easily lock into the rifle. Clint stated that when he tried them on the range with a full 30 rounds, they were stiff fully loaded but did seat into place with a good slap on the bottom of the mag. As such, our conclusion is this. We know that they will easily seat into the rifle with 28 rounds or so and they should work perfectly fine. However, they may require a little break in period to lock up easily in the rifle with a full 30 rounds. Even considering this minor issue, the magazines work great and at this price point you cannot go wrong grabbing a few to keep in your range bag.