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Posted: 10/19/2016 12:56:14 AM EDT
[Last Edit: 10/19/2016 12:56:52 AM EDT by stascom]
I have a BA NiB BCG and SS barrel. The bolt is very tight inside the carrier. Sometimes it locks up so tight on an empty chamber, I have to mortar it (lightly). I've had tight 556 BCGs that would loosen up after a mag or 2. I've put 150 rounds through the new rifle, however, without much effect. Cycles fine. Is this a common thing with 308 ARs?
Link Posted: 10/19/2016 4:30:13 PM EDT
I've had guns that stick on a full chamber but not an empty one.

You're saying that it runs fine but only sticks on an empty chamber?
Link Posted: 10/19/2016 8:10:16 PM EDT
Originally Posted By stascom:
I have a BA NiB BCG and SS barrel. The bolt is very tight inside the carrier. Sometimes it locks up so tight on an empty chamber, I have to mortar it (lightly). I've had tight 556 BCGs that would loosen up after a mag or 2. I've put 150 rounds through the new rifle, however, without much effect. Cycles fine. Is this a common thing with 308 ARs?
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Mine is like this also...AP Nib bolt

Link Posted: 10/21/2016 6:16:48 AM EDT
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Originally Posted By CoryTrevor:
I've had guns that stick on a full chamber but not an empty one.

You're saying that it runs fine but only sticks on an empty chamber?
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Well, it sticks with a round in the chamber, too. I just don't have a reason to cycle the bolt, if it's loaded.
Link Posted: 10/21/2016 6:17:36 AM EDT
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Originally Posted By DUX4LIFE:


Mine is like this also...AP Nib bolt

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Originally Posted By DUX4LIFE:
Originally Posted By stascom:
I have a BA NiB BCG and SS barrel. The bolt is very tight inside the carrier. Sometimes it locks up so tight on an empty chamber, I have to mortar it (lightly). I've had tight 556 BCGs that would loosen up after a mag or 2. I've put 150 rounds through the new rifle, however, without much effect. Cycles fine. Is this a common thing with 308 ARs?


Mine is like this also...AP Nib bolt



Does the bolt feel tight in the carrier out of the rifle?
Link Posted: 10/21/2016 6:31:33 AM EDT
Did you headspace it?
Link Posted: 10/21/2016 1:20:12 PM EDT
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Originally Posted By ErikS:
Did you headspace it?
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If it is tight on an empty chamber it probably doesn't have much to do with headspace.

OP, does the bolt move freely in the carrier when you are holding it in your hand?
Link Posted: 10/21/2016 1:21:56 PM EDT
Is this a home-built gun or a factory-built gun?

Can you pull the BCG and look inside the upper can you tell if the barrel extension is rotated at all?
Link Posted: 10/21/2016 9:45:36 PM EDT
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Originally Posted By stascom:


Does the bolt feel tight in the carrier out of the rifle?
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Originally Posted By stascom:
Originally Posted By DUX4LIFE:
Originally Posted By stascom:
I have a BA NiB BCG and SS barrel. The bolt is very tight inside the carrier. Sometimes it locks up so tight on an empty chamber, I have to mortar it (lightly). I've had tight 556 BCGs that would loosen up after a mag or 2. I've put 150 rounds through the new rifle, however, without much effect. Cycles fine. Is this a common thing with 308 ARs?


Mine is like this also...AP Nib bolt



Does the bolt feel tight in the carrier out of the rifle?


Yes, It is quite snug. Much more so than any ar15. Just feels like it needs to be fired more. I probable have close to 500 rounds through it. Accuracy totally sucks but it has been reliable. I do need to tune the gas block once I find something it likes.
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