Well I was going to post a pic of the upper when I got it and then of the complete upper but I got excited and put it all together and forgot to take pics.
Upper is a DPMS A1 since I couldn't find/didn't want to pay for a Colt. I sent it to Specialized Armament Warehouse and had them add M4 feed ramps to it. Turnaround was two weeks. It fits perfectly to the barrel extension. I also put XS same plane sights in it.
Next I added a SF M500. I used one of these as my very first dedicated weapon light but got rid of it because I thought it was too heavy at the time. I didn't want to run rails on this upper because I didn't want to buy everything else to go with them like a vert grip/rail covers/sling loop/weapon light. I realized that after I added all that the M500 would weigh about the same. I also realized that when I first thought the M500 was too heavy I was running it on a 16 inch HBAR.
Anyway, I really liked how it turned out. I was going to have a range report today but drove all the way out to the range and didn't bring any .223 ammo!?!?!?