The Wilson Combat EDC 9X Magazine features a tempered steel tube treated with a black, anti-friction coating which ensures drop-free operation and smooth feeding in extreme duty environments. Enhanced spring and anti-tilt, self-lubricating nylon follower feeds every type of bullet profile flawlessly. Witness holes in the rear side on both models provide visual round count.FeaturesRemovable Polymer Base Witness holes and red polymer followerEnhanced spring and anti-tilt followerHardened carbon steel with black anti-friction coating