@nprofile1q... Firearms are hard to improve. The last major change was the metallic cartridge. That enabled all the self-loading mechanisms. The last big breakthrough in pistol design was the 1911. Since then it's been new materials and better machining and adding safeties.

What exactly changed in the last 50 years? Snipers were making long shots in Vietnam. Other than electronics for scopes and aiming, what has changed?