Hahahaha Me and my brother had bad experiences with vanguard. They were horrible to deal with, kept no records of anything besides using their red tags, its a mess unorganized mess, and i could literally go on and on about how they tried to lie to us and stuff. But in the end they never fixed anything, lost my mag, misplaced some of my external pieces, and took gave me some pieces that were torn apart.
Besides the point what were you going to upgrade in those? PM me i could probably even do it for you faster and better.