Original Remington "firearm"
It has a 14" barrel and shoots 12 gauge ammo l. It skirts NFA regulations by being over 26" in length. The DM model uses a 6 round detachable box magazine
When the DM model was announced, there were plans for larger capacity mags. I don't know if mfg produced them yet but no doubt the accessory mfgs will jump on it if they can work around any patent issues. This firearm needs a functional drum mag!