10-29-2012, 03:45 AM
If a rifle fails to extract check the gas tube and gas block alignment. Insufficient gas will cause a round to fail to extract. Inspect the extractor for the grip on the brass. Some extractors have burrs which will mar the brass and hinder the spent case from being kicked out of the chamber. I'd also inspect the bolt, gas rings and bolt carrier. Ensure there is no gas leakage around the carrier key.
I 'm sure others will chime in.
I 'm sure others will chime in.

