Ah, I see now on the extractor. I guess I see how the charging handle could be a problem on the first round, but I don't think it's a big deal on the rest of the mag. BTW, I think it's the M-261 that has the double extractors. Ciener has one. Don't know on the DPMS.
I don't think I've ever had a problem with my Ciener not going into battery that wasn't related to the ammo. In all of those cases I got a "light hit" FTFire, followed by a FTExt as the bullet stuck in the chamber and the extractor jumped the rim. I tried running with the anti-bounce weight (it's a semi kit) on the thought that it would help bump the bolt the rest of the way closed but it made it worse instead, I assume because the extra mass slowed the cycling down. I think a stronger recoil spring would help.