Who can tell me what this common plant is? Is this red fruit edible? As small as an apple.

gas well

Fire thorn, fire thorn, generally called fire thorn, a few called fire thorn. Alias: torch fruit, saving military food. It is a very common wild spiny plant in mountainous areas. Pyracantha (Maxim. ) plum, an evergreen shrub of Pyracantha in Rosaceae.