This mechanism, a small lever or button located on the receiver of the Remington 770 rifle, is designed to hold the bolt in the open position after the last round is fired. This feature allows for quick visual confirmation that the magazine is empty and facilitates faster reloading.
The ability to lock the bolt open contributes significantly to safe firearm handling. It provides a clear indication of the rifle’s unloaded state, minimizing the risk of accidental discharge. Historically, similar mechanisms have been incorporated into firearm designs to improve safety and operational efficiency. A readily accessible and functioning bolt hold-open device streamlines the reloading process, particularly beneficial in hunting or competitive shooting scenarios.