05-29-2014, 07:31 PM
LRRPF52 Wrote:Some will, many won't. Use cutting board as vice insulators, and do it sideways, so the rail is against one flat, and the bottom of the upper is against the other.
LRRPF52,
Is that ar15 upper? I've been searching for a good billet upper w/o forward assist, mind sharing who makes that one?


![[Image: upperclamped.jpg]](http://kevinholman.com/byor/ar10noveske/upperclamped.jpg)