I thought Remington carbines were 18 1/2 inch barrels. Was yours cut back by someone. And yes, they are loud. I had a 742 carbine and it wasn't bad with 180 grain loads but seemed louder with 150's. The guys to either side of you at the range may find it louder than you do.
Yes, the normal carbines do...this is a .308 model 7600 Police Carbine - at 16 1/2".


















































