12×92

12×92 refers to a specific type of ammunition, a 12 gauge shotgun shell measuring 92 millimeters in length. This is an unusual or non-standard length for 12 gauge shells, which are typically found in lengths such as 2 3/4 inches (approximately 70 mm), 3 inches (approximately 76 mm), and 3 1/2 inches (approximately 89 mm). The "12 gauge" designation indicates the bore diameter of the shotgun barrel, which is standardized. The "92" refers to the length of the cartridge case.

The rarity of 12×92 ammunition suggests it might be associated with specific firearms or historical contexts. It could be a proprietary cartridge for a particular shotgun model that did not achieve widespread adoption, or it might be a specialized load developed for a niche purpose. Without further context or information about its origin, it is difficult to ascertain the exact application or prevalence of 12×92 shells. Standard shotgun ammunition lengths are well-established due to industry standardization and the need for interoperability between firearms and ammunition. Deviations from these standards, like the 92 mm length, often indicate a limited production run or a specialized design.