The Remington Model 8 rifle was the first commercially successful semiautomatic rifle offered for civilian sale in the United States. It is long recoil-operated and uses a
rotating bolt head. After firing, the
barrel and bolt, still locked together, move rearward inside the
receiver and compress two recoil springs. Then the bolt is held back while the barrel is returned forward by one of the springs permitting extraction and ejection. 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. The Remington Model 8 has a fixed 5-shot magazine and bolt hold-open device which engages after the magazine is empty. 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. Remington created four new
calibers for the Model 8 rifle:
.25 Remington,
.30 Remington, .32 Remington and
.35 Remington. and was the first truly reliable high power semiautomatic rifle ever commercialized (1906). ==Use==