^ a b 'Model 81 Woodsmaster Autoloading Centerfire Rifle'.^ a b c d 'Model 8 Autoloading Centerfire Rifle'.The Model 8 was offered in five grades of finish (Standard, Special, Peerless, Expert and Premier) and was the first truly reliable high power semiautomatic rifle ever commercialized (1906). These cartridges were rimless designs to allow reliable feeding from box magazines. Remington created four new calibers for the Model 8 rifle. It is a take-down design, meaning that the barrel and receiver are easily separated with no tools, allowing for a smaller package for transport. The Remington Model 8 has a fixed 5-shot magazine and bolt hold-open device which engages after the magazine is empty. Once the barrel is returned, the bolt is returned forward by the second spring in so doing it picks up a fresh cartridge from the magazine and chambers it. Then the bolt is held back while the barrel is returned forward by one of the springs permitting extraction and ejection. After firing, the barrel and bolt, still locked together, move rearward inside the receiver and compress two recoil springs. It is long recoil-operated and uses a rotating bolt head. The Remington Model 8 rifle was the first commercially successful semiautomatic rifle offered for civilian sale in the United States.