At its core, first-round pop is primarily caused by oxygen within the suppressor when the first shot is fired. Before the initial shot, the suppressor is filled with ambient air containing approximately 21% oxygen.
When the first round is fired, the high-temperature propellant gases rapidly mix with this oxygen-rich environment, creating an additional combustion event inside the suppressor. This secondary combustion produces extra noise beyond what would typically occur during suppression.
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At its core, first-round pop is primarily caused by oxygen within the suppressor when the first shot is fired. Before the initial shot, the suppressor is filled with ambient air containing approximately 21% oxygen.
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When the first round is fired, the high-temperature propellant gases rapidly mix with this oxygen-rich environment, creating an additional combustion event inside the suppressor. This secondary combustion produces extra noise beyond what would typically occur during suppression.