One of our hunters offered to build an ar for me. I haven't been around them at all. I would like a 223 wylde that would be accurate a ways out there, but not be too heavy. What barrel would you look at? I would like a varmint barrel, but I would like it to be easy to carry too. Is an 18" varmint barrel too heavy to easily shoot off hand? I would like it set up to use flip up sights or a scope and be able to easily carry it in the pickup. Eventually, I would like to get a grendel upper. Any suggestions or ideas are much appreciated.