Type 64 (silenced pistol)
The Type 64 is a Chinese semi-automatic pistol with an integrated sound suppressor. The Type 64 was succeeded by the Type 67. The gun is chambered in the custom-designed Type 64 7.65×17mm rimless cartridges, which are not identical to the 7.65×17mm.
Design
The pistol is a simple blowback pistol; however, using a toggle switch on the breech block, the user can make the pistol operate in single-action mode, requiring manual operation of the slide. Uniquely for a blowback pistol, it features a rotating bolt with locking lugs; this feature is to allow for the selection of semi-automatic or manual operation. When the toggle is set in the semi-automatic position, the bolt is held in the unlocked position, allowing the gun to cycle; when it is set in the manual operation position, the bolt follows the track in the breech block, which locks the bolt in the forward position. Because it is a blowback-operated pistol, the bolt cannot be unlocked by firing, thus locking the slide/breech block. However, the user can still manually cycle the weapon by racking the slide, as racking the slide will unlock the bolt and allow it to move.The suppressor is a two-stage suppressor: it has a baffle system in line with the barrel, and a secondary chamber under the barrel. This secondary chamber is split in half, with the upper half being a simple expansion chamber for the first stage while the bottom half has a port from after the primary baffles to another mesh baffle system. This makes the gun extremely quiet, especially with a lower-powered cartridge like 7.65×17mm rimless.