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Old 02-23-2011, 04:04 PM
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Open bolt vs closed bolt firing??  
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Question Open bolt vs closed bolt firing??

Other than firing the weapon, is there any way to tell if it fires from the open bolt position (weapon in question is an Ingram Arms M10A1)?

Thanks for you knowledge.
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Old 02-23-2011, 04:14 PM
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Open bolt vs closed bolt firing?? Open bolt vs closed bolt firing?? Open bolt vs closed bolt firing?? Open bolt vs closed bolt firing?? Open bolt vs closed bolt firing??  
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Here's a link to an article that states it fires from the open bolt.

Modern Firearms - Ingram MAC M10 and M11
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Old 02-23-2011, 04:16 PM
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Open bolt vs closed bolt firing?? Open bolt vs closed bolt firing?? Open bolt vs closed bolt firing?? Open bolt vs closed bolt firing?? Open bolt vs closed bolt firing??  
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yes....
MAKE SURE FIREARM AND MAGAZINE ARE UNLOADED....
Cock the UNLOADED gun with the safety off....
Does the bolt stay back??
With the bolt back, pull the trigger? does the bolt fly forward?? If so, it fires from an open bolt.
to determine if it is selective fire....hold the trigger down and retract the bolt all the way, and let go of it the bolt...does it fly forward while holding the trigger down?? If so, it is likely capable of full auto fire
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Old 02-23-2011, 08:50 PM
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Open bolt vs closed bolt firing?? Open bolt vs closed bolt firing?? Open bolt vs closed bolt firing?? Open bolt vs closed bolt firing?? Open bolt vs closed bolt firing??  
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Most open bolt guns have a fixed firing pin on the breechface. The round is fired when the bolt goes forward and the fixed pin strikes the primer. No need for a firing pin under spring pressure as on most semi-autos as there is no hammer or striker necessary to hit the firing pin and drive it into the primer.
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Old 02-23-2011, 09:09 PM
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Open bolt vs closed bolt firing?? Open bolt vs closed bolt firing?? Open bolt vs closed bolt firing?? Open bolt vs closed bolt firing?? Open bolt vs closed bolt firing??  
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sheriffoconee has dialed you in. exactly correct. the open bolt ones are far more valuable! 1000.00 range versus 300.00-400.00 range.
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Old 02-23-2011, 09:23 PM
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Open bolt vs closed bolt firing?? Open bolt vs closed bolt firing?? Open bolt vs closed bolt firing?? Open bolt vs closed bolt firing?? Open bolt vs closed bolt firing??  
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I thought the ATF ruled open bolt firing guns as being readily convertible to full auto, and therefor a machine gun whether it actually is or not. Or was that only specific models?
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Old 02-24-2011, 08:45 AM
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Open bolt vs closed bolt firing?? Open bolt vs closed bolt firing?? Open bolt vs closed bolt firing?? Open bolt vs closed bolt firing?? Open bolt vs closed bolt firing??  
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Quote:
Originally Posted by JayCeeNC View Post
Most open bolt guns have a fixed firing pin on the breechface.
Fixed firing pin means straight blowback operation. True for most pistol caliber MGs, almost never true for rifle caliber guns.
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