I have had the following experiences over the last 10 years with DPMS rifles:
1. AR-10, 24 inch bull barrel, nightforce scope. 1/4 inch center to center at 100 yards. 10 ring at 1000 yards (prone with bipod). No issues.
2. Dissipator upper (love the look). 500 rounds a day for 4 days straight (cleaned nightly). No issues.
3. Classic xm177 clone. Fired 3 days, 500 rounds a day (cleaned nightly). No issues.
4. A2 Match upper on rock river lower. Several matches at 600 yards, very accurate, no issues.
Not sure why everyone is down on DPMS...they cycle fine for me. Clean, lube, and go :-)
NOTE: I only use magpul magazines.
