General Categories > General Firearm Discussion
FA BCG
Dan W:
For most reliable operation you want a fully shrouded firing pin like the enhanced AR15 and M16 carriers use. All my rifles have M16 carriers installed
thirtydaZe:
Thanks again everyone.
DCPrecisionLLC:
There is a lot to the BCG discussion more than just reliability. Heavy bolt carriers are stronger and less prone to failure, although it's not a part very prone to failure in the first place. They also help to slow down cycle time in over gassed guns running carbine or pistol length gas systems. However, more mass moving around equals more recoil. That is why you will see some competition guns built with very lightweight BCGs, but then in a standard gas system you will get extremely fast cycle rates and the possibility of bolt bounce. So then you need to start thinking about mid or rifle length gas systems or adjustable gas blocks and heavier buffers.
Bottom line, on a standard gun, I would run a FA BCG :D
on the fritz:
--- Quote from: DCPrecisionLLC on March 17, 2014, 12:58:13 PM ---There is a lot to the BCG discussion more than just reliability. Heavy bolt carriers are stronger and less prone to failure, although it's not a part very prone to failure in the first place. They also help to slow down cycle time in over gassed guns running carbine or pistol length gas systems. However, more mass moving around equals more recoil. That is why you will see some competition guns built with very lightweight BCGs, but then in a standard gas system you will get extremely fast cycle rates and the possibility of bolt bounce. So then you need to start thinking about mid or rifle length gas systems or adjustable gas blocks and heavier buffers.
Bottom line, on a standard gun, I would run a FA BCG :D
--- End quote ---
..... or an adjustable gas block; but that's another aside to this discussion. :)
DCPrecisionLLC:
--- Quote from: on the fritz on March 17, 2014, 02:42:56 PM ---..... or an adjustable gas block; but that's another aside to this discussion. :)
--- End quote ---
--- Quote from: DCPrecisionLLC on March 17, 2014, 12:58:13 PM ---There is a lot to the BCG discussion more than just reliability. Heavy bolt carriers are stronger and less prone to failure, although it's not a part very prone to failure in the first place. They also help to slow down cycle time in over gassed guns running carbine or pistol length gas systems. However, more mass moving around equals more recoil. That is why you will see some competition guns built with very lightweight BCGs, but then in a standard gas system you will get extremely fast cycle rates and the possibility of bolt bounce. So then you need to start thinking about mid or rifle length gas systems or adjustable gas blocks and heavier buffers.
Bottom line, on a standard gun, I would run a FA BCG :D
--- End quote ---
Too bad there aren't many adjustable gas block friendly rails out there right now. Unless you have one that slides completely off fairly easily.
Recoil and reliability all come down to a balance of gas pressure (adjustable gas block and system length), BCG weight, buffer and spring weight.
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