Never handled and shot a dissipator before. Did some research on the kind of dissipator build I wanted, which was an a1 style with a chrome lined barrel. Saw this upper and had to buy it. No regrets AT ALL. As soon as it came in I did a light inspection and cleaning of some factory grease, added a microbest phosphate bcg and milspec charging handle, and put it on a PSA lower with a1 furniture, Geissele rifle spring and PSA stainless buffer. Shot 250 rounds of 556 55 grain from PMC. Not a single malfunction. Love the sight radius and recoil impulse. It’s my new favorite of my collection. Added a gg&g cheap light mount to the front sight post and put on a Streamlight rail mount 1, and a specter gear 2 point sling. Great quality upper and accuracy. I’ll be coming back for more builds. Thank you - AR