Mars pistol: The first pistol with the magazine located under the chamber.
I recently wrote about the new Boberg XR9 pistol which features the magazine beneath the chamber. Dr. StrangeGun discovered that the Gabbett-Fairfax Mars pistol was the first pistol to feature this configuration.

High tech and ugly (Photo from Horst Held)
From wikipedia:
The Mars Automatic Pistol was a semi-automatic pistol developed in 1900 by the Englishman Hugh Gabbet-Fairfax. It was manufactured by Webley & Scott and distributed by the Mars Automatic Pistol Syndicate. The Mars Automatic Pistol is famous for being available in a variety of 8.5 mm, 9 mm and .45 calibres. These were all bottle shaped cartridges with a heavy powder loading, making the .45 version the most powerful handgun in the world for a time. It used a unique long recoil rotating bolt action which ejected spent cartridges straight to the rear.
The Mars Automatic Pistol was rejected by the British War Office as a possible replacement for the Webley & Scott Revolver, then in service with the British Army, because of the unacceptable large recoil, muzzle-flash, and mechanical complexity. It has since become a collectors item because of its rarity and as an example of the earliest developments in semi-automatic pistols.
I dug up the pistols’ patent. The patent drawings show how the rear ward feeding works.
Although the pistol was not practical back in 1900 it was an ingenious design.






Hi, welcome to my blog! This blog is dedicated to all things firearms related. I hope you enjoy it.
I can remember reading a old war office report on the Webley-Mars. The lines that stuck in my mind, in respect of it’s recoil, were that: “No man on firing this weapon, would willingly fire it again.”
Quite an interesting firearm, there’s an entry on it in “Gun: a visual history”.
It says:
Perhaps inspired by the Mauser’s success, Hugh Gabbett-Fairfax wanted to produce a super-powerful pistol; the result was the Mars. Described by users as “a nightmare,” it was complex, awkward, and unwieldy, with a vicious recoil.
As a side note to the ammunition it mentions that “The designer insisted on a heavy propellant load for the Mars bullet.” it seems like it was the Desert Eagle of it’s day.
Dusty, thanks for the info
No problem, it’s quite a nice book. ^^