woohoo. The UPS fairy was kind today... Magpul MOE LPK came in from palmetto, and the 16" middy upper came in from Aim Surplus, including that impossible to find part, the bolt carrier group. looks like it's an m16 style one too.

And I can go pick up my serenity lower tonight.
So now the fun part, taking that gaggle of parts, throwing them up in the air, and watching a complete rifle land on the ground :d
Only thing lacking is a low profile gas block and new rail... but that will be trickier, because I don't have any means of measuring torque on the new barrel nut