177 (4.5 mm) and. Velocity: Approximately 400 to 500 fps depending on the caliber and manufacturing era. Dimensions: Roughly 8.9 to 9.25 inches in overall length with a 6.87-inch rifled barrel.
Weight: About 2.0 to 2.1 lbs (32 oz). Construction: Sturdy metal construction with molded grips and minimal plastic components (on vintage English-made models).Propulsion: Barrel-cocking spring-piston mechanism requiring a firm cocking effort (around 30 lbs). Sights: Rear sights with sliding elevation and windage adjustments; front blade sight. Safety: Manual thumb-lever safety catch.