An excellent Western pistol known for its reliability, high capacity magazine and good accuracy, as well as being among the most ergonomic handguns in its class. One of the most widely used pistols in the Zone, both among professionals and rookies who can afford it. - Call of Pripyat in-game description
It uses 9x19 rounds which are quite easy to obtain nearly anywhere, however it doesn't have much firepower and is advised only to be used as a sidearm, not a primary weapon. The gun and its ammo are very lightweight, making it a preferable handgun for one who doesn't use a handgun frequently. It cannot be fitted with a silencer, rendering stealth impossible with this weapon.
In Clear Sky it is less available. It can be upgraded by almost every technician, it's cheap to upgrade and easy to maintain however albeit susceptible to damage when being fired at a rapid rate but has less chances of the weapon jamming. This is also the only 9x19mm caliber pistol that can be mounted with a silencer.
The Walker P9m is the standard sidearm of lower ranking members of the Monolith faction, it is commonly found in Limansk and in the Limansk Hospital. Some veteran Freedom snipers using SVUs also use this weapon as a sidearm.
It can only be bought from Mitay after joining the Duty faction, although one can be found in the rear of a truck next to a body and an RGD-5 Grenade, as well as a Medkit in a metal case, on the road in the middle of Agroprom on the left fork leading to the Duty base. This is not as easily obtained as it seems, however, as there is no crate from which to mount and then enter the rear of said truck, requiring a different plan of action to be taken. But if the player has not destroyed the boxes at the fork in the road, there is a stack of two boxes near a stack of tires and a bus that can be pushed over to the truck to mount. Alternatively, if you managed to save Sergeant Cheersov near the hole that leads into the Agroprom Underground, he will give you the coordinates of a stash containing the pistol and 1 box of 9x19mm FMJ rounds in exchange for 900 rubles, the stash is located in the final spiral staircase at the bottom inside a toolbox-like object.
You can also get this weapon free of charge by joining Freedom and wiping out the Duty base. Along with the P99, you'll get a Freedom Exoskeleton, a Dragunov SVD, 15000 RU, and lots of ammo.
This weapon also appears in Call of Pripyat. It is capable of three-round burst-fire with a tier 3 upgrade and is one of the best pistols in the game due to its light weight, high durability, large magazine capacity (16 rounds, the highest stock capacity of all handguns), common ammunition type and favorable stats. The only disadvantage is quite disappointing damage.
The Walker P9m can be fitted with a silencer but must be upgraded to do so.