HI i just purchased my MP15-22 at big5 for 400+tax and DROS ;D and was wondering if Aguila, 60 Grain, Sniper SubSonic Ammo would cycle? also if so how quiet are these, ive checked forums and seen videos but still am unsure. i would like to shoot this in my back yard but worried that surrounding neighbors will complain. any info would be great plz thanks