A really neat and quick DIY target project that looks really professional.
An excellent AAR with some very good comments as well.
A very interesting read on a minimalist carbine set up and considerations. Again, so much of carbine setup is very personal, but the modular capability of the AR-15 makes it king of customization.
Speaking of AR-15s, here is a picture of my most recent build. The specs were based off of ideas from my oldest son.
Simple specs: 20" bbl free floated Rock River Arms upper, Del-Ton lower, JP reduced trigger spring kit, MOE+ grip, ACS-L stock, Primary Arms 6x scope. Not sure on the weight, but a big difference between this and my 16" Lightweight Middy build that I normally run. Very pleased so far.
By the way, here is my oldest son running through a quick drill with the aforementioned light weight "16 middy.