First, I just moved my old EOTech Holosight over to my new M&P 15-22. Then, I added a Magpul AFG (which I really like). Then I took a Hogue AR15 grip that was lying around and mounted it on the Colt AR15 9mm carbine and took off the Ergo PS-1 grip and put it on the 15-22. Decided it needed some Magpul MBUS sights, so I took off the factory front and rear sights and mounted the MBUS sights. Lo and behold, the little pin worked itself out of my MA-compliant fixed stock and a Vltor iMod magically appeared (honest!!!!).
That's my "final build" and I'm sticking to it!
TTFN,
"Point Blank Frank"
And thank you Brett248Vista for your YouTube videos. Or "dang you" as the case may be! I'm thinking of more mods because of you.