Bought mine in March, 5xxx serial. FTEs after approx 300 rds, using a mix of Winchester white box 147gr, Blazer Brass 115gr, and American Eagle 115gr - all FMJ hardball. FTE every 3-5 rds, with both factory 15rd mags and 13 rd Meg-gar mags. Sent it back, returned with new extractor and extractor...