All those who're comparing Noise of OFB 7.62 NATO to Galil ACE one,keep in mind the video on ACE is recorded in an open arena,while OFB one is in a confined space with walls near to the shooter so it may boost sound level of the gun.Also,ACE one video seems to be modified via softwares before uploading on Youtube so they might've reduced the sound level on that one to make it sound 'pleasant' to ears of viewers,while OFB one is directly posted on the internet without any sort of editing hence it gives us 'true' sound of the gun.