Lots of AR love and good advice. The PSA Lower is fine for your first AR. Sights; I received a SIG Romeo5 from PSA Friday. As it was our first weekend without rain I had too much work to get done outside to put it on a AR and go shooting. I am impressed with how small and light it is. IMO it is a Best Buy for $119.00. However I mistrust batteries so a set is pop-up “iron” sights are a must for me. Magpul is a good choice for back-up sights that won’t break the bank. AR’s are fun and addictive. Oh not to mention it is easy to change parts so don’t knock yourself out over your choices. You will be changing them anyway. So far on my first AR I have changed the BCG, trigger group, rear stock and the flash hider. But it is not money misspent as the parts I have taken off have or will find them used on other builds. I plan on putting the SIG Romeo5 Red Dot sight on it but there is no way of how long it will stay on these particular gun. (A little mouse is whispering in my ear that I should buy another Romeo5 while they are on sale as I have a daughter that likes AR’s and has already claimed one of mine for herself).