| I was originally disappointed that after I lubed and installed the new L7 bolt in my 2011 rail that it leaked down the barrel. I emailed tech support and received a prompt reply. They suggested I change all my o-rings out including the red o-ring on the bolt. The stock one is red but thier's is black. I only put a new red o-ring on the bolt, lubed and reinstalled. That fixed the leaking problem. I compared the stock o-ring with the one they had on there and it seemed that their's was a little smaller. So anyway after getting to the chrono at the field I had to turn down the pressure almost a full turn. The bolt made it very quiet and very smooth compared to the stock bolt. I was very impressed with the new bolt, even with the faulty o-ring. |