I've discovered a couple more bits of info concerning this in the last few days:
1.) The Mega is manufactured from 7075-T6 whereas the Vltor VIS is 6013-T6.
2.) The Vltor VIS enables you to go with a pinned gas block (like on the Noveske Light Reece VIS 16" Upper). The Mega must use a low-profile set screw type gas block if you want it to go underneath the hand guard.
Also as stated by boltcatch in Reply #3, the Vltor offers a single aluminum heat shield inside of the removable lower portion of the hand guard. The Mega does not offer an additional heat shield.
How important is the difference in construction material??
Realistically, if set screws have loctite and are possibly staked (does anyone ever do that to gas block set screws??), should I ever have any concerns about the gas block loosening up over time??
How big of a concern would it be to not have heat shields incorporated into the rail?? I don't believe LaRue or DD have heat shields and these products are top-of-the-rock.
"Eternal vigilance by the people is the price of liberty... You must pay the price if you wish to secure the blessing." Andrew Jackson
Bookmarks