Abstract: A semi-automatic fluid powered gun includes an elongated barrel having opposed front and rear open ends, and a projectile storage clip for storing a plurality of projectiles outside of the barrel and for sequentially positioning each projectile in line with the barrel adjacent the rear end. A transfer tube is supported to the rear of and in line with the barrel and is movable between a forward position in which it moves the positioned projectile into the barrel and prevents the other stored projectiles from being positioned in line with the barrel, and a rear position in which the transfer tube permits the next stored projectile to be positioned in line with the barrel. An elongated cylinder is positioned to the rear of and in line with the barrel and includes opposed front and rear open ends, and the transfer tube is received in the front end of the cylinder to provide fluid communication between the cylinder and the barrel when the transfer tube is in the forward position.

Abstract: A detent assembly at the breech of a gun having a single-shot, tip-up barrel normally holds the barrel in a closed, firing position, yet permits it to be tipped up for loading purposes upon the application of sufficient upward manual force. The detent securely interlocks the barrel with the valve body closely adjacent to the point of gas transfer from the valve body into the barrel so as to minimize misalignment of the barrel and the valve body due to tolerance buildup and manufacturing inaccuracies. Sealing surfaces on the spring loaded arms of the detent assembly situated on opposite lateral sides of the barrel also serve to cover the gap between the end of the valve body and the barrel when the detent is closed so as to inhibit the escape of gas during a firing action and eliminate the need for elastomeric sealing O-rings.