The rack and pinion geared lever and bolt design can accommodate high-pressure modern magnum rounds.

[4][5] 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.

Although this made the rifle lighter, many owners prefer the steel receiver version.

[6][4] The rifles are made in short-action and long-action models to accommodate a variety of calibers and is available with a straight-grip or pistol-grip stock.

[3] The Black Label Edition include a rugged straight grip laminated wood stock, matte black finish on the metalwork, a multitude of Picatinny scope bases and a 16-inch barrel fitted with a flash hider.