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Old 08-14-2013, 05:52 PM   #1 (permalink)
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hi guys Im Yresk and im sorry to bother you with my questions
but im writing a book as it is and guns are a big part of it and i need help
because my 2 most trusted weapon know it alls are in a conflict.

the story is in part about this guy who is a extremely good soldier and he
has a hobby of making new guns and its his pride and joy that is the source
of the conflict

the weapon is a modified M249 that first of all can regulate its ROF
that is not the problem the problem is one of overheating. i had written that the barrel and breach had been significantly reinforced to act as a heatsink so the gun would not overheat. but one of my friends tells me that this is completley impossible. so for now ive written in that the gun has 2 barrels and you can
switch back and forth between them by a shotgun like pump and twist move
im very happy if you could shine some ligth at this problem that is keeping me up at nigth

Yresk
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Old 08-14-2013, 06:23 PM   #2 (permalink)
 
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The M249 DOES have a quick change barrel system, and M249 gunners routinely carry a spare barrel.
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Old 08-14-2013, 06:45 PM   #3 (permalink)
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Maybe a heat proof glove.
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Old 08-14-2013, 06:48 PM   #4 (permalink)
 
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Originally Posted by BrothersInArms View Post
The M249 DOES have a quick change barrel system, and M249 gunners routinely carry a spare barrel.
I tried to find a youtube video but ran into a bunch of airsoft crap and gave up
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Old 08-14-2013, 06:49 PM   #5 (permalink)
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im sorry but that does not really answer the question
can you reinforce the breach and barrel or install heat sinks
to make it far easier to handle the heat built up by rapid firing?
or is the dual barrel approach the easier approach?
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Old 08-14-2013, 06:56 PM   #6 (permalink)
 
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If you keep heating the barrel too much you'll damage it. Best thing to do is change barrels
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Old 08-14-2013, 07:04 PM   #7 (permalink)
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then pose another sollution would it work if the barrel was made
out of another material that was better at absorbing heat? i know im
grasping at straws but i would story wise prefer to have the one system
that does not require changing of barrels. just reloading is big enough of a
risk you dont want more things to distract you from shooting the enemy
the closest to a war ive been is airsoft games and whenever i was not
combat ready to shoot i felt like i had a big target on my face
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Old 08-14-2013, 07:53 PM   #8 (permalink)
 
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Either change barrels or reduce the rate of fire. I'm sure that after all these years we're probably using good materials for our barrels.
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Old 08-14-2013, 08:58 PM   #9 (permalink)
 
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The barrells are pretty good right now.

Adding material to make a heat sink or even add fins like some guns in WW2 or a water jacket like in WW1 all work ( to a point) but add a lot of weight.

Modern military experience points it to it being less total weight to just carry a spare barrel as more effective than fins and lighter than a water jacket.
(but this solution is heavier than fins and less effective than a water jacket).
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Old 08-14-2013, 10:15 PM   #10 (permalink)
 
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So, I think the OP is looking at a modification to the actual weapon, such as having the spare barrel be "part" of the gun. No, it may not be totally practical, but that is why they call it fiction.

I guess you could have both barrels attached to a strut that runs the length of the barrels, and would facilitate rotating one barrel into battery and have the other along side until it is needed.
Of possibly some variation of the old swivel barrel muskets.

No, it's not quite the same, but as long as we are inventing things, why not be inventive?
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