Chris Mayers Marushin XM177E2 ... running great

I just found this video on youtube. I hope Chris Mayers does not mind me posting the link here ...

https://www.youtube.com/watch?v=aL8BqOq-k5g

I do not know what modifications he did, but it is running great.

A Japanese member asks: "Excuse me. I don't think the handguard is genuine. Which manufacturer's stuff is on? Does machining be necessary for installation?"

The Marushin m16’s have given me a fre headaches.
I have not reached This fine Level og Smooth function
Congratulations to Chris

And thanks to Madmike for sharing