The barrel has a probability of being dropped by killing the lightning boss of HAZE, the engine has a probability of being dropped by airdrops and Easter egg barrels, and the receiver has a probability of being dropped by killing an intelligence agency zombie.
In summary, when faced with common questions for novices such as how to make the Unturned A6 Polaris Destroyer Cannon, you can go in to find more strategies. We have collected and compiled many novice strategies for your reference!