I need some advise from someone who has had a dpms lr 308 extractor break before. My rifle is built on a Mega upper and lower set, it is a 6 Creedmoor, rifle length gas system,standard buffer and spring. Also I have been using a carrier weight system. I used a Dpms bolt and carrier with this build. This gun has functioned 100% up to 5-6 hundred rounds when the first one broke. And then the replacement extractor broke today at approx. 990rnds. I have been around the ar platform quite a while and have never seen this before, and never twice. My gunsmith said he has not seen this ether. I am thinking it may be caused from the carrier weight. And need advise as to why they are breaking and where to find another extractor because Midway and Brownells are out of stock. Thanks for your help.