https://youtube.com/watch?v=3boTTCk3His
Woah another shitty "puzzle" for a really awful gun.
Gun genuinely sucks, you get 2 shots and then have to reload, but if you reload like it's Gears of War and get it at the right mark you fill a square, and get 3 shots now, do it 3 times with each adding another to the total and on your fourth reload you get infinite shots for a few seconds. The squares also decay over time if you don't do the reload. Who the fuck is going to do that while fighting? Too much hassle and the damage is bad.