The Firearm Blog

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

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.

The video:

Specs:

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

The Good:
The little Kel-Tecs are very easy to conceal, with very little weight or bulk. They are also very inexpensive.

The Bad and Ugly:
On the 2nd or 3rd round fired, the little bracket that the guide rod slides through fell out and disappeared. I’m told that Kel-Tec now makes slides without this piece, the bracket is a part of the slide, rather than a separate part.

More here.

Guns and Ammo have a review here.

I ran a couple of different types of ammo through the pistol, shooting as fast as I could recover. There is a distinct upward flip to the muzzle. You have to accept this in an auto so light, particularly when most of the weight is in the top half. Still, it was possible to keep six fast shots in a vital zone, and that is all the P-3AT is meant to do. In my hands, the pistol delivered the first shot about eight inches low and left of the remaining five. There were no malfunctions.