AR-15; AR-10 Recommendations

[fabsroman]

Okay, I think I finally have this figured out for the most part because I received an e-mail response from Dedicated Technologies. I am going to get the Rock River Arms lower, the V-Tac hand guard, and an upper from Dedicated Tech in .223 WSSM. He doesn't recommend using any other gas block other than the one provided because the WSSM round creates additional heat that the standard gas blocks cannot handle. He is willing to charge me the difference between the standard hand guard and the V-Tac.

Next set of questions.

What trigger should I get for my lowers? Should I send the lowers to JP and have them put their single stage trigger in the lowers, or should I just buy an aftermarket trigger and install it myself. If I should buy an aftermarket trigger and install it myself, what are your recommendation for an after market trigger.

To have an upper built for my lower, do I have to send my lower to Dedicated Technologies, or any other place that would build an upper for me?