This is a Sig 556 SWAT Patrol that has been custom NP3 coated. If you're not familiar with that coating, I'd suggest you read up on it. Unfortunately, this coating is no longer offered by anyone for custom firearm projects, although it's still used in the aerospace field. As such, this is probably your only chance to get an NP3 coated Sig 556. This one has the factory SWAT rail, and a factory Swiss stock. This is probably the nicest 55X type setup you can get without picking up an actual Swiss import. I've got other Sig 556s as well and a plethora of parts and accessories if you've got one and are looking for anything.
For more pictures or if you have any questions, please text or email me, as I don't check this often.
303-731-6009