i really like the jp barrel how does she group. also is the heat sink affective. i want to finish my rifle in a federal dark earth color. that color of brown or tan blends in year around in ohio. i am wondering if the jp low mass bolt and recoil buffer are relaible enough for a zombie rifle. sounds like it would be great for lonrange critters. i am thinking that i might like the stainless bolt carrier. it seem that people online have had the chrome come off the carrier . i am trying to figure out what lower i want to use. the hand guard must free gloat but i am tryimg to decide if i want a railed tube or a smooth one you can put rails on. that is a nice set up man.