whats open Bolt system in guns?
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The bolt is tasked with pushing the round into the chamber, holding it there while it fires, then coming back to extract the casing so the next round can be loaded
A bolt action rifle is your basic closed bolt system. If you want anything to happen when you pull the trigger then you need the bolt to be closed (forward) so the round is in the chamber and ready to go. This is basically the go to for semi-automatic designs and is considered to be more accurate because there’s less movement between trigger pull and bullet leaving
Open bolt designs latch the bolt in the back(open) while waiting for the trigger and when you pull the trigger its released and is pushed forward by springs, grabs the round, loads it, fires, and is pushed back to its locked position by gas from the fired round.
An open bolt is useful in a machine gun because it keeps the next round in a cool spot rather than sitting in the hot chamber where there’s a chance it could cook off and fire without pulling the trigger.
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