It’s fun to put together your own stuff. I think some people don’t realize it’s not that difficult.
It's not that difficult, although I ran into a couple problems with my build yesterday, I enjoyed the problem solving aspect. I had a CMMG selector that wasn't to mil spec. Darn thing wouldn't budge when the hammer was activated. I went through all kinds of dis-assembly and reassembly, until I tried a left over selector from my last build where I upgraded the selector in my LPK with an ambi-selector. The switch worked. In the process, my fingers gained some muscle memory that will make future builds so much easier.
I think I turned a guy on to building his own at the range today. He was looking at buying a S&W Sportster until I let him shoot my A3. When I told him that the cost wasn't any different to put an adjustable stock on the weapon that an A2 stock, he was sold. If I recall correctly the S&W didn't have rails. So it really isn't much different than an A3.
He was a young guy with good eyes and did a better at shooting than me with iron sights. Very nice kid, and he confirmed that I can still sight-in a weapon with my old and tired eyes. He shot just after I finished sighting-in the weapon. His groups were tighter than mine, under 1 MOA at 100 yards. By the way, I used the RIBZ method for the first time for sighting-in the weapon. That was the real highlight of my day ... having a set of young eyes and a good shooter to confirm my work.