 Another notable feature is that the trigger moves with the lever when it is operated, which prevents the shooter's trigger finger from being pinched between the lever and the stock when the lever is closed.Production of the BLR began in the 1960s.The original "Model 81 BLR" revision had a steel receiver, which was changed to an aluminum alloy receiver with the introduction of the "Model 81 Lightning BLR" in 1995.