I have never seen this before but that doesn't mean anything. Will these variations never end. Hope not, a lot of mystery is what makes collecting these replicas fun. Uberti first introduced the Remington New Model Carbine in 1963. They offered it with 16", 18", and 20" barrels. I have never seen any except the 18" barrel. So far Uberti is the only manufacturer who made the Remington Carbine.