Thanks yea it fits fine the holes all line up fine you can still see light from in between the upper an lower but not a lot and it shouldn’t be an issue. I’ll just file the flat part of the plug down an see how it works. I got a 80% juggernaut lower that I’m milling out and I’ll see if it fits any better with my next build which will be the same style upper but with a 20 in barrel.