WE M4 GAS ROUTE SHIM

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My WE-Tech GBBR 416 was having bad gas efficiency issues. I found that the Gas route on the top of the mag was not sealing against the nozzle. To find that out, I pushed the mag UP into the mag well and shot till the gas ran out, it was significantly shooting more rounds per gas fill. That tells me the gas route is not sealing correctly. After hours of searching for something to buy that would fix the issue, i found no results. other then the Video posted below. Using that video i did the same thing he did but i printed it instead. This item goes under the gas route and pushing it up to seal better against the nozzle as he shows in the video. I understand the mag he is using is not a WE-Tech M4 Mag but the concept is exactly the same. NOTE: The plate on the top of your WE-Tech M4 mag will not sit as flush as it did prior to install. That is okay.VIDEO: https://www.youtube.com/watch?v=G4S2sspWmH4Disclaimer: this video is not mine but is a good use of reference on how to install.