Erratic Ejection Pattern

[georgeib]

These two steps should eliminate the extraction/ejection/feed problem-
-Install a Colt extractor spring with no O ring.
-Perform a flick test on the ejector. Installing a new ejector plunger and spring at this point is cheap insurance.

Next-
-Install an H2 buffer and carbine buffer in the lower (assuming you have a carbine RE).
-Test with full power 5.56 ammo. Start with a lockback test. Use a magazine known to be good.

Notes-
-Buffer weight will not fix over or under gassing. You must deal with the over-sized gas port before continuing troubleshooting. The easiest and least expensive way to do that is to get the proper BRT EZ Tune gas tube. Once this is done, you can resume troubleshooting. If you have further malfunctions after following the instructions above, they should be due to gas leaks and/or out of spec dimensions.

100% this!