According to China Military Network, picatinny rail, also known as fishbone, MIL-STD- 19 13 guide rail or STANAG2324 guide rail, is a standardized accessory installation platform installed on light weapons. It was invented by Picatinny Arms Company of the United States, hence its name.

Gun (formerly known as spear, spear, musket and iron cannon) is a kind of weapon that uses the energy of gunpowder gas to fire bullets and attack unprotected or weakly protected living targets. Gun is the main weapon of infantry in the army and the auxiliary weapon of other arms. Widely used in public security, hunting, sports competitions and other fields.