Like the Sig P250, this pistol is also modular, meaning that you can remove the internals (which are the serial numbered part and considered the “firearm”) and transfer them between other frame sizes. Frames available in full size, mid size, and compact.
9mm, .40 S&W, .45 ACP, .357 Sig.
Sig 320 Reliability Tests:
Sig 320 Chosen As The US Army’s New Sidearm:
Sig 320 May Discharge When Dropped:
It has been discovered that the Sig 320 can accidentally discharge if the pistol is dropped on or hit in just the right spot. It appears that this isn’t a malfunction of the internals of the pistol, but rather a design flaw that allows the trigger to move and discharge the pistol when inertial is applied in just the right direction. It also appear that this problem only occurs with civilian pistols. The trigger on the XM-17 version is different and is not effected in the same way. Sig Sauer offers an upgrade as a supposed fix to the problem.