A-5 sniper and full auto combo

this is mine and my brothers guns, my gun has a barrett 50cal. shroud with a borg tech sight riser, 6 posit. collapsable stock, 18 inch opsgear fluted barrel, and i have an offset hopper. my brothers gun is also an A-5 but has tech t squishy paddles, UMP 45 shroud, has E-grip with 3 round burst, Ramp, full auto, and semi auto, he has a red dot sight (red and green dot) and a flatline barrel not shown in this video.