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• The Mimic Gun does not appear in the Ammonomicon.
• Munchers will not accept the Mimic Gun as of the A Farewell to Arms Update .
• When the Mimic Gun disappears, there is a chance that the third gun in the player's arsenal will still be visible, even when not switching guns.
• If the player dies with the Mimic Gun, it appears in the player's list of items with a unique appearance.
• If the Gunsling King challenges the player to complete a room using a specific gun, it won't replace the Mimic Gun, automatically failing the challenge.
• Entering the past with Mimic Gun will make the player unable to shoot, making it impossible to win.
• Because item calculations are done based on the player's current inventory, it's possible to encounter multiple mimic guns in a single run.
• The mimic gun always fires exactly 4 degrees counter-clockwise from the direction aimed. This is an extremely minor effect, but cannot be corrected with accuracy upgrades.
• If the player has Challenge Mode active and encounters the Gun Queue modifier, the game will leave the player without a gun until the room is cleared, which is nearly impossible to complete.
• Attempting to play [Winchester] 's mini-game while holding the Mimic Gun will soft-lock you in the dialogue with [Winchester] , as you are unable to accept his mini-game gun while you are holding the Mimic Gun.
• Saving the game and reloading while holding the Mimic Gun will turn it into a regular gun that can be switched away from and switched back to at will. The gun will not appear in the player's inventory screen and will not disappear with damage dealt, nor with ammo pickups. The gun can even be dropped and picked up again, doing so will not revert it to its mimic behavior. Feeding the gun to a Muncher works, in which case it counts as a D-class gun.

Encounter a Pedestal Mimic .