The muzzle device is not permanently attached and it is a rifle. If your able to get your hands on one do so because they are close to perfect IMO.Recently saw a 716 tread that I like. It’s advertised as a 16” barrel. But the sig owners manual I’ve seen says the barrel is 15.98”. Isn’t that an SBR? It has a muzzle device, but I do think it’s permanently attached.