it all started on wednesday while i was shooting my AR-15 (dpms oracle). it was shooting fine until the last 20 rounds when it started to not cycle properly. luckily for me, one of your staff was in the range and offered to take a quick look. he is the funny looking guy named ivan. he asked me a series of questions and found out that i had never cleaned my gas tube (im a noob and didnt know that the gas tube required cleaning) so he suggested that i give that a shot. i did as he said and brought it back to the range today but the problem persisted. he took the time to rip my gun apart and found out that the gas block was loose and fixed it for me. dpms did not put any loctite on the little screws. now everything is dandy so a big thank you goes to mister ivan!