Originally posted by zorstorer
I was a gunner in the M2A2 ODS Bradley. While the screen doesn't look right, you can hear the exhaust fan kick on after the third round. Not sure if they would install an exhaust fan for an external mount.
One thing that stuck me was the lack of the chain drive sound in the video. When we would fire the 25mm all you would really hear (from the turret) was the exhaust fan and the motor cycling the bolt. You really didn't hear the actual report of the round being fired. About the tragectory, there could be quite a bit of zoom on that view. Also there are quite a few rounds for the 25mm, APDS and HEI among others.
The computer will adjust your elevation based on the range to the target and what round you have loaded in the active belt. So he was firing HEI the whole time but as he is slewing to the left you can see a round impact and not detonate.
It sure sounds like it might be taken from a viewer in the rear of the vehicle. Maybe it was a stryker? Just a guess there, but it convinces me it was a 25mm Bushmaster chain gun.
The "fan" sound could also be from the AC units they bolt onto HMMV's (and probably MRAP's) in Iraq. That's a common modification. It also sounds a lot like the radio equipment like when you key the mic to send a message while on high power with a SINCGARS or Falcon-III set.
At the beginning, before the first round fired, you hear what might be the manual (or mechanical, depending on the remote system used) cycling or chambering of an Mk19 weapon.
The screen is what sells me on a remote mount to a HMMV or MRAP.... just seems a little simplistic for a Bradely or Stryker system, but I don't have hands on with any of those systems.
But you've more experience with the 25mm that I have. Mostly our heavy weapons were Mk19's and M2's. And I've no idea on the screen magnification that could be in use there.... if 1:1 or so, I'd say a 40mm round. If high magnification, then you are probably right with the 25mm.
