After shooting a few rounds today, I was cleaning the barrel of my Accura. When I took the breachplug out and was cleaning the threads I noticed a hole in the bottom of the barrel going through the barrel and into the barrel block thats welded onto the bottom of the barrel. After a little checking there is a hole in the front of the barrel block that connects to the hole in the chamber right behind where the breachplug would be if it was installed. The only thing I can think of is its some kind of aa blowback relief. It must work because yesterday while cleaning the barrel I lost the tip of a Q-tip in the barrel block end and today the tip was in the forarm. I sent CVA an email asking them because there is no mention of any such thing in the instruction book. Can anybody share any light on this?