神秘人左轮手枪是特殊版本的.44左轮手枪，掏出来的时候会有独特的神秘人背景音乐。除了珍珠色的握把外，整把枪上都有着复杂的蚀刻花纹，并进行了银色抛光。比起普通的.44左轮手枪，它的开火速度明显更快，单发威力也更高。如果你的潜行技能在50以上，那么它也可以被你带进赌场。Like most unique weapons, weapon modifications cannot be used on the Mysterious Magnum.
If the Mysterious Magnum is given to a companion, the Stranger's theme will play when they use it.
Holstering it will make the second part of the tune play.
Drawing/Holstering the weapon while sneaking will cause the tune to play softly, thus not giving away one's position to enemies. The enemy seems to never hear this tune while the player character remains hidden.
It has a greatly reduced item HP compared to the standard .44 Magnum revolver, meaning that it will need to be repaired more often.
Has platform::PC When drawing the revolver, the tune will occasionally play twice. To hear it play correctly, simply go into third person and draw the revolver. This may be caused by possessing the Quick Draw perk, or a high Agility. [已核实]
Has platform::PC You can obtain two of the revolvers by stealing the weapon from the Lonesome Drifter and then later doing a barter check of 50 during the quest Talent Pool. [已核实]
Has platform::PC If loading a saved game from the main menu in which you have the Mysterious Magnum equipped and drawn, the reload animation takes twice as long as normal. This can be solved by simply switching to another gun and then back again. [已核实]
Has platform::PC When you use .44 Magnum or the Mysterious Magnum in 3rd person view, most of the time you will miss the target, even while you're aiming, therefore making it better to use this gun in 1st person view. [已核实]
Has platform::PC Occasionally, when the Mysterious Magnum is equipped, the speed loader of the weapon can be seen stuck to the back of the cylinder and protruding from the back of the gun. This glitch has no effect on gameplay, as it is merely cosmetic. It can be fixed by un-equipping it and re-equipping it, reloading it or switching ammunition types. It also happens with the regular .44 Magnum, especially with the Heavy Frame. [已核实]
Has platform::Xbox 360 When dropped, the custom design on it disappears. This bug does not otherwise affect gameplay. [已核实]