Ar 9mm Listing ID: 3084245

it's an ar15 but chambered in 9mm that can easily go back to being a 5.56 or you could even swap the uppers and just slap a 5.56 upper in this setup and boom you got a 556 arp. The lower is all set up for ar15 which is why it take this special mag so it can be used with the 9mm upper asking 750 obo