|“||This unique, heavy-duty submachine gun is not very useful on the run, but with careful aim and adequate cover, becomes a razorblade in the night.||„|
|— In-game description|
On the surface the Liar looks like a worse Fiddler SMG: same damage (3 or 4 shots to kill), longer reload, heavier, slower fire rate. It loses accuracy if moving without aiming. It loses more accuracy from mouse movement. It even takes longer to aim.
However the Liar has a much lower recoil, slightly more range, and a slightly higher accuracy. If you take the time to aim the Liar can shoot long bursts with a tighter spread than any other SMG.
Due to its characteristics, the gun shouldn't be used in a "Run & Gun" fashion like the Fiddler. You should always wait for the gun to stabilize, then slowly move toward the enemy and use cover.
Like other SMGs, it's more efficient at night.
The gun's higher stability and accuracy allows it to stay competitive at the higher end of its range. At rifle range (~28m) the Liar can still kill in 5 or 6 shots and a good stable position will ensure at least half of its bullets hit (something the Fiddler definitely cannot do). The Liar also doesn't lose accuracy when firing standing and in full cover. This means the Liar is less at a loss during the day and in open combat.
The No.1 "The Liar" Submachine Gun appears to be based off the Beretta M1918 submachine gun.