I have developed an automated script for the Apex Legends game that allows you to quickly fire two Mastiff shotguns. During the creation process, I noticed that the use of shotgun closures is not mandatory, since they do not affect the rate of fire. Unlike butts, which are known to significantly accelerate the change of weapons.

Lines 6 and 13 of the script indicate delays depending on the butt level on Mastiff: PURPLE - 392 ms, BLUE - 445 ms, GRAY - 477 ms, WITHOUT butt - 610 ms. You can change these values at your discretion, however, I strongly recommend using only those values that have already been tested. The use of other delays can lead to failures, due to which one of the two shotguns may not fire a shot.

I also do not recommend installing the script on the RMB button, as this can make inventory management difficult and cause other inconveniences. Use it wisely and good luck in the game!