Beretta made a LOT of different 9mm pistols. However, if you are asking about the M9 pistol used by the US Army, it is about 8.5 inches long.
Check the Beretta website.
Beretta M9 9mm
0-350 USD depending on condition.
The USMC uses the Barretta 9mm.
That is the correct spelling of the handgun model Beretta M9 (standard issue 9mm pistol of the US armed forces).
I just purchased a 9mm Beretta FS pistol. I would like to know the caliber of the round that this gun takes.
The Beretta M9 utilized 9x19mm rounds (standard 9mm fare).
An unloaded 9mm cartridge case would weigh somewhere around 3 grams, varying between manufacturers. <><><><><><><> However, if you are asking about an unloaded 9mm PISTOL, that will depend on WHICH pistol. The US Army M9 pistol weighs 33.6 oz empty- other makes and models will have different weights. Sort of like asking how much a car weighs- A Neon or a DeVille?
Which one?
The 9mm Parabellum is longer than the .380 ACP (also called the 9mm Short) They do not interchange.
The Beretta CX4 is a pistol caliber carbine in caliber 9mm Parabellum. The energy of the 9mm cartridge will limit effect range to about 200 meters. Beyond that the vertical drop will become so significant as to make practical accuracy a problem.