| The Boberg XR9
The world's most powerful 9mm pocket-sized pistol. |
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Still frame of the Boberg mechanism in action.
Update: Boberg XR9 Micro versus G26. The original goal of the XR9 Shorty/Micro series was to duplicate the ballistics of the G26 but do it in a gun that is similar in size to a Beretta Tomcat. Below is the overlay, with the accompanying ballistics chart using 47 popular styles of 9mm ammunition. All shots were done through a Shooting Chrony 13 feet away at a temperature of 65 degrees F.
Below are the styles of ammo tested. Two styles of handloads are not shown.
Summary Basically, the XR9 is a pocket pistol with a full length barrel, having the magazine located directly under the chamber. The patent-pending feed mechanism grabs a cartridge from the magazine and delivers it straight into the chamber. This allows the chamber clearance to be significantly less, causing less energy and noise to blast out the back. With this combination, kinetic energy is maximized, and in many cases will exceed the energy produced in full-sized pistols.
Background As you will see in the cross-section view or in the animation, the XR9 features a pull-back style mechanism. These type of mechanisms had been successfully used in past weapons, but only in machine guns, of which were designed by Hiram Maxim, John M. Browning and others. The famous Browning 1919 machine gun was a very reliable weapon of war. Another example of pull-back feeding was done in the Mars pistol, just before the turn of the 20th century. Unfortunately, the gun suffered feed errors and failed in military qualification. Other pistol designs that located the magazine under the barrel chamber were the "blow-forward" designs that arose between 1896-1925. The principle of operation consisted of some unknown force moving the barrel forward, exposing the top of the magazine, and various methods of allowing a cartridge to rise up in line with the barrel without having it fly out of the breech area. Although novel, these designs had reliability issues. The Boberg XR9 differs from prior technology in that the cartridge is positively controlled from the time it is extracted from the magazine until the empty case is ejected from the breech area. The use of modern CAD/CAM technology and Dynamic Modeling has allowed this design to succeed where others in the past have failed.
Contact InformationPostal address St. Paul, MN
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