I just put together my 1st AR, a 10" pistol.
I ordered the upper pre-assembled so I didn't really "build" the whole thing but I put the lower together.
I haven't been shooting with it yet. I like the stainless barrel on yours, I used a stainless one too, other than that everything is pretty no-frills, mil spec. I also deleted that bump on the a2 grip because it didn't feel good
That's great that you take cryptos at your business!