Details:
-> A volley of projectiles is fired all at once or in a tighter interval compared to the Autogun line.
-> The projectiles spread along a cone-shaped region, similar to how projectiles travel from the Autogun line.
-> The projectiles in both the basic and charge attacks are fired at the end of a "rev-up" animation.
-> The "rev-up" animation and following final animation render the player unable to perform non-UI actions similar to the behavior of the Autogun line during shooting.
-> From the press of the Action button to the end of the animation timeline, the total animation durations for the Boomstick are equal to that of the Autogun line -- this applies to both of the basic and charge attacks.
-> The "rev-up" animation for both basic and charge attacks will create a vibrant particle effect with a unique silhouette that will make it easy for players in PvP to see that a player will soon unleash a burst of projectiles towards the end of the animation.
-> The basic attack consists of 6 projectiles unleashed at the end of a "rev-up" animation.
-> The charge attack consists of 15 projectiles that are unleashed at the end of a "rev-up" animation; the animation is longer than the basic attack.
-> Boomstick projectiles travel the same distance to that of the Autogun projectiles.

Implications:
-> Higher-risk, higher-reward on close-range enemies with low HP or players in PvP: while Autoguns may miss projectiles leaving an enemy with some health points left over, the Boomstick will instead take the enemy or player down (unless the enemy/player has sufficient health to survive the blast). However, it is possible to miss an enemy entirely, leaving you exposed during the entire animation with the enemy having its health completely intact.
-> The Boomstick is very similar to the Autogun line, hence the "Reskin" note in the title.

More on Animations:
-> To help understand the timeline, it may help to create an example. If the Autogun takes 1 second to unleash all of its projectiles and allow the player to take Action once more, then the Boomstick's "rev-up" animation would take 0.8 seconds, with the projectiles emitting at the 0.8 second mark, and then there being another 0.2 seconds of a final animation before the player can take action once more. In other words, the animation duration for the Boomstick is the same to that of the Autogun line, but the timing of the projectile emission is different.

Because of its strong similarity to Autoguns, this weapon could be treated as a "Reskin". Therefore, it could be unique to prize boxes or an event.