Talk to me about blowback

[propellerhead]

Last weekend, I shot over 100 rounds of .22 using the Ciener .22LR Conversion Kit. After reading about the Gas Buster and the home made fix, I looked at my AR and noticed this... a lot of white powder residue underneath the charging handle.



Looking at the top side of the charging handle, any blowback would go upwards. I don't see how that home made gasket fix would do anything in my case.



The bottom side tells a different story. Look at the streak that goes out towards the end.



Now look at the top of the lower receiver.



Here's another view of the receiver without the charging handle.



And one with the charging handle in place.



I think I found the culprit. There's a small gap underneath the charging handle and the crud is making its way out. I bet that's what's hitting me in the face and giving my that stinging sensation. I can think of two options to fix this. 1) Find a charging handle that's taller so it fills in the gap and there's less up and down play. 2) Add some sort of gasket to close that gap. I bet I could close some of that gap with some sort of sticker or duct tape on the bottom side of the T-end of the charging handle.

Your thoughts?

[spamlovr]

Anything like tape or a sticker wouldn't survive the first time you got any oil or cleaning solvent on it.