The Desert Eagle is a famous pistol in the Counter-Strike series, and its firing sound became instantly familiar to FPS players through years of matches, clips and frag movies. Online, creators often use this shot as shorthand for accuracy, confidence or a high-damage hit. It still shows up in edits because even a very short sample is easy to recognize. Sounds from the same series, like enemy spotted or bomb has been planted, are often used alongside it in Counter-Strike themed memes and compilations.