OLE388 RTP SLOT 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. The Type 64 (aka "Type 64 silenced pistol") is a Chinese semi-automatic pistol with an integrated sound suppressor. Kinard, Jeff (2003). Pistols: An Illustrated History of Their Impact.|What's the Difference between Photoelectric and Ionization Smoke Detectors?