09-27-2011, 07:58 PM
Does your upper have M4 feed ramps? Does your barrel extension have M4 feed ramps? Have you tried other mags?
As far as lubricants go, I only use Slip2000 now, which lasts longer than anything else I've seen, while remaining viscous...but yes, AR's need to run wet. Since you have a 20" barrel wit rifle-length gas, a larger gas port is necessary. Think about how much gas it will need in the winter.
Also, as Bill said, stove-pipes are an indicator of ejector or extractor problems. Test your spring tension on your ejector, and ditto on the extractor lip geometry. I had that issue with a factory DMPS LR308, and replaced the extractor.
As far as lubricants go, I only use Slip2000 now, which lasts longer than anything else I've seen, while remaining viscous...but yes, AR's need to run wet. Since you have a 20" barrel wit rifle-length gas, a larger gas port is necessary. Think about how much gas it will need in the winter.
Also, as Bill said, stove-pipes are an indicator of ejector or extractor problems. Test your spring tension on your ejector, and ditto on the extractor lip geometry. I had that issue with a factory DMPS LR308, and replaced the extractor.