Baffled by BCGs in Washington State - Page 2
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Old 12-19-2012, 02:30 PM   #11
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I believe that is the shroud I am refering to. IIRC it prevents the hammer from hitting the firing pin as the bcg cycles out of battery. I'm not sure what it does on a FA fire control group tho, as I do not fully understand how they work.

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Old 12-19-2012, 06:17 PM   #12
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Knowing too much could be too tempting to some. Maybe legally it's better not to fully understand how they work!

For me, and most of us, it's not that tempting. A full auto firearm is the last thing I need but I do want the higher quality bolt and carrier since it's such an important component of the AR. Looking at diagrams of the full auto and burst trigger group it's pretty confusing to me. And it was 1968 since I last held an M16!

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Old 12-19-2012, 07:38 PM   #13
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Quote:
Originally Posted by 70cuda383 View Post
I thought there was a timing issue too, something about the difference on the bottom of the carrier that changed the timing of when the auto sear was engaged? or is that added metal simply there for mass?
The timing issue has to do with the weight. The heavier it is the slower it cylces.

Heavier doesn't necessarily mean better.

The race gun guys like to run lightweight BCGs and Buffers so they can cut down on split times.
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Old 12-19-2012, 07:39 PM   #14
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Quote:
Originally Posted by Quentin View Post
Knowing too much could be too tempting to some. Maybe legally it's better not to fully understand how they work!
Amen to that.
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Old 12-20-2012, 09:04 PM   #15
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Ran across a picture and thought of you....



Here ya go, enjoy.


top, semi auto.

middle, enhanced.

Botton full auto, notice how much less exposed the firing pin is.

bcgs.jpg  
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Old 12-20-2012, 09:07 PM   #16
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Most SA BCGs today are enchanced. The top one is really only found on older 30+ year old ARs

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