Cliffs notes version - what upper receiver fits best with a LaRue 556 lower?
Explanation version - I am dead set on completing my newly received LaRue lower with a LaRue upper however I'm also dead set on having a quad rail. In a perfect world I'd find a 12" LaRue Stealth 1.0 and be happy as can be, so far my daily searches have turned up nada however so exploring another option.
Since LaRue sells 12" barrels I could in theory buy that with gas block and tube and add it to a stripped upper receiver and be almost 100% LaRue but I've seen posts about non LaRue uppers not lining up well with LaRue lowers which brings me to the reason behind this post.
If you're still reading this, I'll also ask if the LaRue gas block and tube are good as the intention will be to have the rifle suppressed 99% of the time.
Thank you!