Ordered a Wilson Combat Recon 14.7........muzzle device missed clearing the rail by about .4 or so. Wouldnt be able to get my can on there. \Ran over to Brownell's and grabbed a Criterion 16in Hybrid contour. Heavier but not too bad. On the bright side, I liked the WC barrel so much Im going to build another one with it.
I saw that one, it was like 50% off and I’ve been tempted as well!
My Criterion in 308 is a nice shooter. Good choice.
scalarworks.com 
www.brownells.com only thing i don't like about the Brownells version is it doesn't have flats for clamping in a vise. I had one, the AR-15 version, it was my 1st ever reaction rod. price, affordable. after i got one that can be clamped in a vise, i ended up giving it to a friend, advised him to spend a few minutes and grind a flat into the end so it doesn't spin when clamped in a vise. you only need to flat one side, "D" shape is sufficient to prevent spinning in the vise jaws.
i always pack the (tiny) POF roller cam bearing with moly lube (grease) before installing it. same way you pack grease into a front wheel roller bearing. that smoothes it out a lot. sofar in my limited experience, that job is a one-time thing. I work the grease in from the top, spinning it a little, using finger pressure to sqeeze the grease in, untill it starts to show at the bottom.
clank is probably bolt carrier when it contacts the barrel extension face going into battery, especially in absence of gun grease, oil on bolt, carrier rails, receiver bore interior. if so, that's normal. sound is amplified by the aluminum rail.
dunno what to say. I use the POF BCG roller cam on all of my 308 upper builds, about 10 sofar, don't have THAT kind of clank. Aero M5's, usually with Aero BCG's. Also use it on all my AR-15 piston builds, no issues.
