09-08-2011, 05:51 PM
A 7.62x39 extractor should work--both cartridges share the same rim dimensions. I have ARs in both 6.5 and 7.62x39, and I do remember comparing the two extractors. The only thing I remember for certain was that one extractor was slightly wider than the other and wouldn't quite fit in the bolt. I don't remember which one it was, though. Maybe it was just a tolerance issue instead of a design difference. I know that the Grendel boltface is slightly deeper than the 7.62, allowing more "meat" on the extractor hook end, but I don't know if that'll preclude using a 7.62 in a 6.5. I'll try to make a point of hauling out both irons and comparing the extractors. If I don't report in a day or two, ping me via IM to help me kickstart the old rememberer.