Derya's 15rd 9mm magazine keeps the DY9Z fed with the parts it was built around. 15rds in a compact pistol footprint makes this the working configuration for the platform, whether the gun rides in a holster or lives in a range bag.Spare magazines are smart insurance for a pistol that runs on its own magazine pattern, since substitutes are hit or miss and spares for niche models get harder to track down as the years go by. Experienced owners pick up extras early rather than hunting for them later.