Internationally recognized for its outstanding field accuracy, the IIW77 carbine, originally produced in 1982, is still considered the most successful fixed barrel underlever spring-piston sporting air rifle made. Many factors contribute to the fine accuracy of the 1 IW77. Foremost are its precision barrel with 12 rifling grooves in the .177 caliber, and the superb firing control allowed by its two- stage, Beeman "R" series trigger. The fine ordinance steel action, barrel and cocking lever are hand polished and blued to a standard that exceeds most air rifles produced. The walnut stained beech sporter stock has a soft rubber butt plate, and features a long, tapered forend, with checkering on the pistol grip. The I IW77 comes with an all-metal click rear sight, micrometer adjustable for windage and elevation and a post front sight.

In 1994, the HW77 was given a sibling.

The new version, dubbed the HW97, was designed for the shooter who would only use a scope on his air rifle. The sights were removed and were replaced with a muzzle brake on the front and the receiver was grooved to accept 11 mm mounts. The stock was modified with a Monte Carlo cheekpiece that is higher than normal. Besides enhancing the air rifle's looks, the high comb also keeps your eye aligned perfectly with the cross-hairs of the scope.

Continually improving on this model, in 1998, Weihrauch gave the IIW77 / IIW97 a power upgrade. This model series now has the performance approaching that of the RI, and it does this with little increase in cocking effort or felt recoil. Should you have an older HW77 / HW97 the Beeman gunsmiths can install an upgrade kit that will increase your power level to that of the current production models.