I have a Daniel Defense lower and upper with an AAC 9" 300 BLK barrel. Only issue was with 300 Whisper bullets. 1 out of 5 would FTE. I tried different mags and buffer weights to no avail. I went desperate and stuck a rubber o-ring on the extractor spring in the DD bolt. All whisper issues have been solved for about 250 rounds and counting. Remmington 147 gr 300 blk bullets still function just fine as well.
I've acquired my AAC 762 can post the craze and haven't shot it suppressed just yet. But I have no worries it will function fine.
Last edited by matemike; 02-24-13 at 15:01.
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