lightning link
 

i have seen two people so far selling a registered lightning link online...
they are not cheap indeed...

assuming i could actually obtain one,
would it be possible to use the lightning link with a newer smith and wesson m&p 15 or a rock river lar-15 ?
(without actually milling the rifle?)


or rather, can anyone recommend where to get some information or
which lower will work out of the box?

thanks.