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by jccooper 3970 days ago
Automatics commonly work on recoil, sometimes on gas pressure. Without a bullet, recoil is less (see Newton's laws) and so is gas pressure (there's no temporary plug in the barrel). Most semi-auto pistols will not operate with blanks unless modified in a way that would make them incompatible with regular ammo.
1 comments

Ah, interesting. Never mind then, stupid idea on my part :)