I was browsing Palmetto State Armory's web site and saw a great deal on a 10.5 in. 5.56 cal. complete upper with the bolt/carrier & charging handle. they call it "blemished" but I can't see anything wrong with it. I have been wanting a 5.56 pistol upper to inter change with my 9 in. 300 Black Out upper. while I think the 300 BLK is a much better round out of a short barrel, there are times when a 5.56 has advantages. (cheap & radially available ammo for one) I don't plan on putting my suppressor on it. (much) I just want it for a compact Personal Defense Weapon/blast o matic. when I came home for lunch today, the big brown truck of happiness left the new upper and the iron sights I ordered for it! so I put them on, oiled the bolt and headed to my range. the skeeters were horrendous but I managed to put a couple of hundred flawless functioning rounds though it. I couldn't believe that the sights were almost dead on out of the box! I didn't have to touch the elevation and only had to bring the rear to the right a couple of clicks. good thing cause like I said the skeeters were bad! I may or may not put a red dot on it down the line. probably a rail to mount a light too.