It was the US Army's standard-issue sidearm from 1911 through 1985 and it, along with its countless derivatives, has remained popular in law enforcement, civilian and military applications all around the world.
The Kora could be considered the 'entry-level' .45 pistol. It is a balanced sidearm, combining good firepower and durability. Due to its robust design, it is always the most durable pistol .45 caliber pistol in all games, although usually having mediocre stats for its class.
The Kora 919 is a good upgrade from the most of the nine millimeter pistols in the early game, since it fires more powerful .45 ACP bullets. However, of all the .45 caliber handguns it has the lowest damage rating, is the second heaviest and lowest accuracy of them all (The first of both being the Black Kite), but has the highest rate of fire and being the most durable of all of them. It is also the cheapest .45 caliber handgun available.
In Clear Sky, the Kora now has its stats increased for the better, it's now one of the most accurate pistols in the game while still having very favorable stopping power and handling, although still offset by its small 7-round magazine.
When fully upgraded for accuracy and damage, the Kora is unparalleled in distant shooting and delivers decent damage in terms of pistols. It has the second overall highest damage for pistol as it only falls short of the Black Kite and has the second highest accuracy rating for a pistol, where it falls short of the Noiseless pistol (PB1s). It is also has the second lowest overall firing rate, both of which are just below the Black Kite. It can be fitted with a silencer.
The earliest way to get this pistol is by buying it from Sidorovich, but as an alternative method of getting this weapon for free quite early in the game, the player can either:
Go to the Dark Valley and take Ganja's job for clearing out the gas station of a bandit squad just outside the Freedom base. The bandits there will almost all carry Kora919 pistols along with a few spare rounds.
Do the job from Yoga, where the player would have to clean out the flea market of stalker. One of the rewards is a stash with a fully upgraded Kora 919, tooled for damage and accuracy.
Clear out the concentration camp in the Garbage of bandits. One of the diggers will thank him by giving him the coordinates of the same stash in the task above.
In Call of Pripyat, the Kora is the worst .45 pistol in the game, retaining it's status back in Shadow of Chernobyl. The Kora now has poor handling, high recoil, can no longer mount a silencer b, 7 round magazine capacity and below-average stopping power and accuracy along with the weight of 1.00kg unloaded makes it a pain to use, even when modified to Tier-3. It's only redeeming quality is it's above average durability than most .45 pistols by default.
Generally speaking, more effective .45 caliber pistols: SIP-t M200, UDP Compact and the Black Kite can be acquired a little earlier in the game and Nimble can provide custom versions of the same caliber for a small fee of 3500RU. Owl and Hawaiian will occasionally stock this handgun but can be easily salvaged from dead stalkers, given their widespread nature.
^aNote that in the unpatched version (1.000) of Shadow of Chernobyl, the Colt was virtually non-existent as it is not sold by any trader and not held by any other stalker, save for Sparrow's custom pistol. In subsequent patches: it appears in Barkeep's sale.
^bWeapon models are copied from Stalker: Clear Sky, so making Kora able to attach a silencer to it requires only changing one value in w_colt1911.ltx file.