WTG! Nothing wrong with supporting Magpul. Its amazing how good plastic stuff is.
Not intending to insult you or anything as you may know more than me on AR stuff but why the Timeny? Id think youd be money ahead and just as happy investing in a lighter trigger spring and some MINOR Arkansas stone polishing on your standard battle group set up. That is unless you are planning on doing long range stuff.
Its been my observation that a good trigger really shrinks your 100yd groups. Now, with my rifle that is set up simialr to yours, Im not concerned with a tight hundred yard group.