I'm putting together an AR for my girlfriend so I bought her a .556 SOTA upper with just the plain handguard with plans to swap it out for the new pink magpul moe setup. I picked it up today from David at CCF and the problem we found is that my upper uses a barrel nut and the MOE foregrip requires a delta ring setup. What all does it take to change this over? Is it as simple as just getting a delta ring and swapping it all out or is there more stuff required? I've got a buddy who is really good with AR's and I'm going to try and get in touch with him tomorrow but wanted to get y'all's input. I'm fairly new to the AR so any help would be greatly appreciated. Thanks and have a great holiday season!