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Posted: 11/6/2002 11:23:11 AM EDT
I was just reading about problems with the early XM177E2 and the article noted that the muzzle flash and sound were severe compared to the regular M16. What causes the sounds and flash to be so much greater?
Link Posted: 11/6/2002 11:56:20 AM EDT
The powder used was still burning when the bullet left the barrel, IMO.
Link Posted: 11/6/2002 12:04:41 PM EDT
Actually the peak pressure in an AR is around 7-8" if I am not mistaken. The closer the end of the barrel is to that the higer the pressure of gas will be exiting the barrel. Higher pressure gas is louder.
Link Posted: 11/7/2002 5:25:53 PM EDT
Shorter bbl. higher pressure on exit= more boom, more unburned powder= more flash, easy as that.
Link Posted: 11/7/2002 5:55:03 PM EDT

Originally Posted By DevL:
....... Higher pressure gas is louder.




yup. just like that little fuck Tom Daschle.
Link Posted: 11/7/2002 6:46:36 PM EDT

Originally Posted By DevL:
Higher pressure gas is louder.



You say that like it's a bad thing.
Link Posted: 11/8/2002 1:19:35 PM EDT
shorter barrels are always louder because the muzzle is closer to your ears!!!
Link Posted: 11/8/2002 4:06:49 PM EDT
Not true because a 20" bullpup is closer to your ear than a traditional 14.5" barrel and the 14.5" barrel will be louder even though its further from your ear.
Link Posted: 11/9/2002 4:51:36 AM EDT
If distance dissapates the decibel level of noise how can that be?
Link Posted: 11/9/2002 8:06:45 AM EDT

Originally Posted By 6mmAR:
shorter barrels are always louder because the muzzle is closer to your ears!!!



That would be my assumption also.
Link Posted: 11/9/2002 1:17:50 PM EDT
Because the sound as measured at the barrel is louder in the short barreled gun. The amount it is reduced by holding it further away does not completely counter act the extra noise it is producing. Go shoot a 20" AUG and shoot a 14.5" barreled AR and the AR is louder even though th barrel is further away.
Link Posted: 11/9/2002 2:02:01 PM EDT
I'd say my 14.5" AR is louder for someone standing 5-10 feet to the side than it is for the actual shooter. Maybe it's the muzzle brake...
Link Posted: 11/23/2002 5:36:30 PM EDT
This phenomenon is called overbore. Which means the cartridge holds more powder than can be burned BEFORE the round leaves the barrel. My 44mag Ruger Super Redhawk with 8.5" barrel also is considered to be overbore with +P rounds. Try placing a sheet 5-6 feet in front of the muzzle, and shoot a few rounds. Look at the sheet, and if you see burn marks, it is an indication that unburned powder has left the barrel. BTW you should see the muzzle flash of my Ruger at dusk! 6' flame! Pretty awesome display all right! "Popeye"
Link Posted: 11/23/2002 6:12:58 PM EDT
Originally Posted By DevL: yup. just like that little f$%k Tom Daschle.
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Ha! He's a [u]big[/u] f$%k!
Link Posted: 11/23/2002 6:18:28 PM EDT
Originally Posted By Blisters:
Originally Posted By DevL: yup. just like that little f$%k Tom Daschle.
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Ha! He's a [u]big[/u] f$%k!
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No he is not! you guys just let Rush get you all riled up[:D]
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