I got my MUR-A1 from Grant yesterday and put it on my BM lower which has a B.A.D. to test out this very thing.
The upper is stripped so I could not really go all out testing it, but I put the bolt and CH in the upper, attached it to the lower to see if the BAD would give it any problems.
I seemed to have none. I did not notice the BCG hanging up at all.
I installed the MUR by closing the pivot pin first, then closley looking at the BAD/Bolt catch as I lowered the MUR to close the take down pin. It did not seem to move though it was VERY close to the MUR Upper.
I cycled the bolt a few times with the charging handle, locked it back a few times. I did not drop the bolt because there is not bbl attached to the upper, so when I released it I slowed its movement with the CH.
I did not notice any interferece. Now, this could all be because my BM lower and or parts, ie bolt catch are out of spec, who knows, but I did not see any problems.
Having said that, I will still have to check all this again when I assemble the rifle with a Noveske lower and Grant's LPK. [side note, color of Noveske lower does not match MUR

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I saw someone on this board say that there was an issue a while ago, and contacted VLTOR asking if they had heard anything. They said no issue was brought to their attention. Unfortunatly I no longer have the e-mails.
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