Boberg XR9: High Tech Pocket Pistol

    The XR9 is a prototype 9mm pocket pistol by Boberg Engineering. What makes it special is that the magazine located directly under the chamber. This allows it to have a full size barrel (4.2”). Think of it as a bullpup equivalent in a pistol (not the best analogy but you get the idea)!

    What a beautiful looking pistol

    Xr9-My Hand
    Standard black frame, Gen II prototype

    The Boberg feed mechanism differs from traditional feed mechanisms in that it draws the cartridge backward from the magazine (see video).

    What is not obvious from this view or the video is the rendundancy of the mechanism. The lifting device, consisting of the lifting linkage and the ramp, imparts a kinematically balanced motion to the cartridge as it is lifted. This is important because the cartridge is accelerated rearward an upwards of 2000 g’s. Any impact on the cartridge by the ramp is absorbed by the resiliency of the ramp. This combination, along with containment of the case flange, is sufficient to feed cartridges; however, a top stop is added to prevent any further upward motion of the cartridge.

    Even a poorly designed lift mechanism would feed cartridges somewhat reliably when using the top stop alone; however, the Boberg XR9 uses both kinematic balance and the top stop to provide complete and redundant control over the cartridge as it is picked from the magazine, lifted to be in-line with the barrel, and placed into the chamber.

    Cross Sec

    The video:


    Caliber: 9mm
    Length: 5.8”
    Height: 4.2”
    Width: 0.95”
    Weight: 19.5 oz with magazine
    Barrel Length: 4.2”
    Capacity: 7+1
    Action: Rotating-Barrel Locked-Breech
    Sights: Dovetail windage, 5.1” radius
    Trigger Pull: 6.5 lb DAO
    Safeties: 3

    It will be very interesting to see what becomes of this pistol.

    More info here.

    Hat Tip: Ahab

    UPDATE: The pistol is expected in 2009.

    Steve Johnson

    I founded TFB in 2007 and over 10 years worked tirelessly, with the help of my team, to build it up into the largest gun blog online. I retired as Editor in Chief in 2017. During my decade at TFB I was fortunate to work with the most amazing talented writers and genuinely good people!