The Magpul MAG560-BLK is a 20rd magazine for modern sporting rifles like the AR15 family of rifles. The latest M3 version of the Magpul polymer magazine features the lastest improvements to an already excellent ammunition feeding device. Long life stainless steel spring along with 4-way anti tilt follower gives long service life with virtually no chance of a feeding malfunction. The constant curve internal geometry ensures proper feeding for more reliable function than other AR15 magazines. The Magpul MAG560-BLK has a new improved grip texture for positive handling on the front and rear of the magazine. The Magpul MAG560-BLK has a dot matrix on the bottom portion to mark magazines with a paint pen for fast identification purposes. Easy floor plate removal for cleaning and maintenance as well as pop off dust cover that is used for storage and to help reduce risk of damage when in transit or in storage.