The jezail (Sometimes Jezzail from the Pashto language) was a simple, cost-efficient and often handmade muzzle-loading long arm commonly used in British India, Central Asia and parts of the Middle East in the past.
Jezails were generally handmade weapons, and consequently they varied quite a bit in their construction. Jezails were seen as very personal weapons, and unlike the typical military weapons of the time which were very plain and utilitarian, jezails tended to be very well crafted and were usually very beautifully and artistically decorated.
Jezails tended to have very long barrels. These sorts of long weapons were never common in Europe, and only were otherwise seen in American rifles like the Kentucky Rifle. The American rifles were used for hunting, and tended to be of a smaller caliber (.35 to .45 or so being typical). Jezails were usually designed for military use, and therefore tended to be of larger calibers than the American rifles, with .50 to .75 caliber and larger being common. Larger calibers were possible because the long length of the typical jezail meant that it was heavier than typical muskets of the time. Jezails typically weighed around 12 to 14 pounds, compared to 9 to 10 pounds for a typical musket. The heavy weight of the jezail allowed it to absorb more force from the round, imparting less recoil to the weapon's user.
Many jezails were smooth bore weapons, but some had their barrels rifled. The rifling, combined with the barrel's long length, made these weapons very accurate for their time.
The firing mechanism was typically either a matchlock or a flintlock. Since flintlock mechanisms were complex and difficult to manufacture, many jezails used the lock mechanism from stolen or broken Brown Bess muskets.
The stocks were handmade and ornately decorated, featuring a distinctive curve which is not seen in the stocks of other muskets. The function of this curve is debated. Some say that it is purely decorative in nature. Others say that the curve of the stock allowed it to be tucked under the arm and cradled tightly against the body, as opposed to being held to the shoulder like a typical musket or rifle. The argument against this method of firing is that the flash pan would be dangerously close to the face and the weapon would be harder to aim. It is more likely that the rifle was only tucked under the arm whilst riding horse or camel. It has also been stated that the weapon was fired by grasping the stock near the trigger, like a pistol, while the curved portion is tucked under the shooter's forearm, allowing the rifle to be fired with one hand while mounted.
Jezails were often fired from a forked rest, or a horn or metal bi-pod.
The jezail in the Anglo-Afghan Wars 
During this period the jezail was the primary ranged weapon of Afghan warriors and was used with great effect against British troops. British Brown Bess smoothbore muskets were effective at only 150 yards and accurate at 50 yards. Because of their advantage in range, Afghan rebels typically used the jezail from the tops of cliffs along valleys and defiles during ambushes. This tactic repeatedly devastated the British during their doomed retreat from Kabul to Jalalabad. Despite the advantages over the Brown Bess, British forces were typically able to defeat jezail armed Afghans when they fought on relatively flat terrain.
In the First Anglo-Afghan War the British established a cantonment outside of Kabul with dirt walls approximately waist high. Surrounding the cantonment were several abandoned forts which, although out of range of British muskets, were close enough for jezail fire. When ghazi and other Afghan forces besieged Kabul and the cantonment, they occupied the forts and used them to snipe British forces from a safe range.
Afghan snipers were expert marksmen and their juzzails fired roughened bullets, long iron nails or even pebbles over a range of some 250 metres. The Afghans could fling the large rifles across their shoulders as if they were feathers and spring nimbly from rock to rock. They loved to decorate their rifles: [Lieutenant James] Rattray writes of finding one adorned with human teeth.
The jezail in British literature 
The jezail is most famous, at least in Western literature, as the weapon which wounded Dr. Watson—the fictional biographer of the fictional detective Sherlock Holmes—in the Battle of Maiwand during his military service in Afghanistan. In A Study in Scarlet, Watson mentions being wounded in the shoulder. However, in The Sign of the Four, Watson gives the location of the wound as in his leg. In The Noble Bachelor Watson refers to the Jezail bullet being "in one of my limbs." These discrepancies have caused debate by Sherlock Holmes fans about which of these locations is the "correct" location of the wound.
The jezail is mentioned repeatedly in some of Wilbur Smith's books, most notably "Monsoon".
The jezail was also mentioned in the George MacDonald Fraser adventure Flashman, whose protagonist describes the awful slaughter of British Army troops retreating from Kabul to Jalalabad by Afghan jezailchis.
It is used as a metaphor of a cheap weapon in Rudyard Kipling's poetry describing British casualties in colonial wars:
- A scrimmage in a Border Station
- A canter down some dark defile
- Two thousand pounds of education
- Drops to a ten-rupee jezail.
Another reference to the jezail occurs in Kipling's novel "The Man Who Would be King", where the Kohat Jezail is mentioned in the same paragraph as the more advanced Snider and Martini rifles of the British. Kohat is a region of modern Pakistan.
P.G.Wodehouse in "The Little Warrior" (1920, English title "Jill the reckless") describes how the character Uncle Chris, in India during his first hill-campaign, would "walk up and down in front of his men under a desultory shower of jezail-bullets".
Contemporary use 
The jezail no longer sees widespread use in warfare of any nature. Limited numbers were, however, used by Afghan Militia during the Soviet War in Afghanistan. Derivatives of the jezail, barely recognizable, and usually termed 'country-made weapons', are in use in rural India - especially in the state of Uttar Pradesh.
- Ko-i-staun foot soldiery in summer costume (lithograph, British Library)
- Doyle, Arthur Conan. A Study in Scarlet, 1887
- Doyle, Arthur Conan. The Sign of the Four, 1890
- Wodehouse, P.G. (1920). "XX, part 3". The Little Warrior.
- Tanner, Stephen, (2002) Afghanistan: A Military History From Alexander the Great to the Fall of the Taliban, Da Capo Press, ISBN 0-306-81233-9
- "Firearms of the Islamic world in the Tareq Rajab Museum, Kuwait" By Robert Elgood