9mm AR. How many rounds before too dirty?

[stascom]

They are nasty things to clean. Seems like the lower gets pretty well packed with carbon. Has anyone shot one without cleaning until failure? 5.56 guns get through a thousand rounds typically. Double that, if you drop some oil in the BCG periodically. Can't imagine 9mm getting to half that.

[boss281]

If i shoot 200 or more rounds a session with typical factory ammos, then I at least field strip and clean. I have been using Winchester WinClean series of late and it really minimizes the gunk. I have shot the 90, 115, 124 and 147 grain rounds and only the latter had failure to feeds now and then. This is in a 1995 Colt 6450 and a new Colt 6951 with Colt or Metalform magazines...

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[p7fl]

I've switched my 6951 to grease. Drop the bolt into an ultrasonic when I can. Add more grease if I can't.
So far no major issues.

[HardToHandle]

QC10 Glock lower with 8.5 inch upper begins to stumble around 250 rounds.
Usually filthy brass at 50 rounds. Squirting in some oil may prolong the period between cleanings slightly.

[fedupflyer]

I have a QC10 lower and bolt with a 10' PSA upper and I have ran at least 2500 rnds through it and have only wiped out the lower once.
Haven't had an issue.

[D.O.A.F.S.]

I shoot USPSA with my colt 6951. It gets cleaned once a month, the night before the monthly match. I practice at least once a week sometimes twice, each practice I run 200-300 rounds through it depending on the drills I'm focusing on. It gets dirty for sure but even at 2000 rounds it runs with out issues. With that said I due lube the bolt every practice session.