Sig Sauer Gmbh

David C Johnson

Krzysztof J Kras

John Wilson

An air gun includes two different types of energy sources that may be used to fire a projectile. A first type of energy source may include an air cylinder having a piston that moves through a cylinder, as urged by a mechanical spring or gas strut, to create compressed air charge for firing a projectile. A second type of energy source may include a compressed gas storage tank that holds compressed air, or another propellant, that is released during firing to urge the piston through the air cylinder to create a compressed air charge for firing a projectile. An air gun may, additionally or alternately, include features that promote efficient delivery of a compressed air charge to a transfer port and projectile chamber, during firing. Examples of such features include piston configurations that reduce or prevent piston rebound through the interaction of the piston face and air cylinder, upon impact.

Air gun with multiple energy sources

A locking adjustable cheek rest comprising an upper U-shaped portion and a lower portion located on the stock of a rifle or other firearm. The U-shaped portion is biased against the lower portion, such that the walls of the U-shaped upper portion press against the lower portion, thereby locking the upper portion in position. A first release and a second release are depressed to release the bias and enable the upper portion to be raised and lowered relative to the lower portion. Interlocking mechanisms located on the upper and lower portions facilitate locking of the cheek rest in a position determined by the user.

Growing community of inventors

New London, NH, United States of America

David C Johnson