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Posted: 5/12/2009 3:21:56 PM EDT
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While looking at this picture i was thinking about when having a case failure, and how that type of failure tends to bend the extractor up making case extraction very difficult. it looks like the carrier makes a decent seal against the barrel ext face, here come my idea, make a single notch or port in the carrier that would line up with one of the gaps allowing the pressure from a case failure to vent and greatly reduce damage to bolt, potential allowing weapon to be quickly cleared and returned to duty if under fire. Maby another similar port in the bolt to prevent extractor destruction.
I think a simple port would allow the gas to escape leaving the extractor intake. Is this a stupid idea, what say you guys? 
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| I don't know, but something to consider, if you vent the explosive like overpressure from a case failure, in an attempt to save the Steel extractor and bolt, could it NOT instead burst and shatter the Aluminum Upper Receiver, right near your face and eyes as you fire? |
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Quoted:
I don't know, but something to consider, if you vent the explosive like overpressure from a case failure, in an attempt to save the Steel extractor and bolt, could it NOT instead burst and shatter the Aluminum Upper Receiver, right near your face and eyes as you fire? Idk, if it vented in to the mag well area, it would probably blow the mag out as i have seen before. But would hopefully leave the major parts still working, this is my major thought behind this idea. Any one else have any thoughts. |
| The gas sealing is a safety feature. Stop and think about the pressures you're talking about venting into the upper receiver. That hot gas will hit the upper with such pressure it will likely cut the metal like a blow torch and keep on going. Right into your face. |
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Well, the Mauser 98 rifle was designed that way. Hot gasses from a ruptured case can leave backwards using the left guide channel in the receiver as escape route.
To prevent the shooter from getting this into the face there was a heat shield incorporated in the bolt sleeve. Other bolt action rifles using the same design or have at least (usually two) venting holes in the locking area of the receiver blowing such gasses outwards. |
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