Based on the HW100, which is Weihrauch's first pre-charged pneumatic gun, the HW100S is an example of a world-class rifle. True to the heritage of all Weihrauch guns, this rifle will reliably and repeatedly deliver power and accuracy. The HW100S has a walnut Monte Carlo sporter stock with a raised cheekpiece. The checkered pistol grip and forearm provide additional control. The gun cocks with a sidelever, which swings out and back (toward the rear of the rifle). A 14-shot rotary mag makes it easy to drill shot after shot (2 mags come with the rifle). There's an optional single-shot mag (especially useful for field target shooters) that's easy to install without causing permanent change to your rifle. The manometer (air pressure gauge) is embedded in the front of the air reservoir, which hangs free from the barrel (free-floated barrels tend to be more accurate). Manufacturer specs state that the ideal fill pressure is 200 bar (approx. 2900 psi). You'll get a little over 120 shots from one tank fill. If you plan to shoot field target, .177 should be your choice. Hunting small critters? The .22 cal. model is optimal. Don't forget to add a scope, as this rifle doesn't come with open sights. Scope not included