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I purchased a 6mm ARC Odin works 21" xl rifle length gas system w/ bolt carrier and adjustable gas block combo. I ran into some issues with it cycling the next round had to buy a reduced power spring and tweaked the gas block for it to run right. It cycled ok after that.. I wanted to run a jp spring instead so I ended up drilling the gas tube port hole a little bigger, I put an old cleaning rod inside the barrel as a stop after it was done i installed jp spring tweaked gas block again after that it and VOILA! ran flawlessly. I'm shooting .43" inch groups all day with 107 Sierra match kings charged with LEVERevolution 29.3.. powder is dirty though going to try out Winchester staball match soon, work up a load with that. But over all I am satisfied with the barrel after the bigger port hole was drilled bigger, I emailed ODIN and told them they need to fix that issue.







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