I recently purchased a parts kit from the AGD online store.
The very next week the o-ring that sits between the powertube and the bolt died. The replacement O-ring in the parts kit is blue and noticeably thicker and much more rigid. This O-ring causes my bolt to stick out farther and it caused me to chop like mad (something that my E-Mag never does). What is the deal with that blue o-ring? Is it not the right one for where I was putting it? Will it damage my gun to fire it without that o-ring?