Just an update. I figured out how to fix the scar bolt lock back issue. Take a grinder to the bolt where the catch usually goes in. Put a slant on it towards the outside of the gun. Basically what I found was happening is while the part was flat it would work but round off very quickly. This slant assists the catch in grabbing the bolt and with the extra force created by the c02 that I use it actually pushes it harder into the position rather than just slapping it back out.
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