I’m not super familiar with firearms and usually only see them in video games. I notice that pistols and sub machine guns use something called blowback to load the next round from the magazine. My understanding is that the recoil of the round pushes the bolt back and ejects the bullet. This works for pistols and submachine guns like a Glock or MP40.
For rifles though, they have to be gas operated or put in a separate tube so that the gas can go backwards to push the bolt back. Why is this the case? Why can’t rifles like the M16 or AK47 simply use blowback and let the recoil of the gun push the bolt back and load the new round?
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It would not be good for the rifle. The impact damage over a long period would probably lead to malfunctions and damages.
Remember most rifles are designed to be used by soldiers, operating away from home base under terrible conditions. A rifle has to be reliable even after thousands of rounds have been put through it. If it is isnt, the rifle is pointless.
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