I've got a couple of candidates but I'll start with this: Kovrovsky Mekhanichesky Zavod OAO Nosorog AEK 906 revolver 9mm The Nosorog 9 mm AEK 906 revolver is unusual in that it follows the usual revolver design approach apart from the barrel, which is located opposite the bottom chamber in the cylinder, rather than the usual top. This arrangement has been selected to improve the balance of the revolver by moving the approximate centre of gravity further towards the bore axis and dropping the line of fire relative to the shooter's hand. This is claimed to reduce the recoil reactions produced on firing and thus enabling a second aim to be placed back onto a target more quickly. It would also appear to result in a very robust construction for the pistol. The standard Nosorog AEK 906 revolver is chambered for the 9 × 18 mm Makarov cartridge, while the AEK 906-1 is chambered for the 9 × 19 mm Parabellum round, although the latter should be confined to the lower power rounds rather than the P+ variety. Rounds are inserted into the cylinder held in a single stamped steel clip holding the full load of six rounds. Firing may be single or double action. Each pistol is issued with 10 ammunition clips and a holster. Specifications Cartridge: 9 × 18 mm Makarov (AEK 906-1, 9 × 19 mm Parabellum) Operation: double- or single-action revolver Feed: 6-round cylinder Weight: empty, 800 g Length: 215 mm Height: 138 mm Width: 38 mm Sights: fore, fixed blade; rear, notch Muzzle velocity: 280 m/s (AEK 906-1, 320 m/s) Max practical range: 50 m It's so weird looking, I'm starting to like it! Sadly can't we use pistols with barrels under 4'' in NZ.