I saw this too.
I'm building a DPMS.
Anyone use any of the Nickel Boron BCG's for a DPMS LR-308?
Black Rain or NIB-X?
I have one in an AR-15 but I read once a while back of someone who had problems with a non-stock BCG in their DPMS and it seems AR10's (or DPMS 308's) are a tad less standard and sensitive to altering parts (still fighting to get my Geissele Trigger to fit- grinding/polishing time)
Then again, I've heard mixed reviews for Nickel Boron BCG's in general.
Thanks!