Ok. Here's the deal. Ar's have gotten to a point where I can afford one and you can find then in stock. Core 15 has a decent rifle for 615 with LIFETIME warranty. Dpms, bushmaster (same now I guess) few others have rifles in that range but core is the only lifetime warranty. But there is another option. Build my own. I don't have a drill press so a sripped anything is out but palmetta has a reject complete liwer for 179. Some of the anodizing is scratched so u get a deal. I can get a upper for 600 with 1 to 8 twist and chrome lined that I want. But no warranty. There are even cheaper uppers that have chrome lined and 1 to 7 or 8 if u want. I looked for heavy ammo in 556 and it's not easy to find. How much does it hurt to have a 1/7 with 55 grade? If that's all that's available or all I can afford shouldn't I just live with the 1/9 of core. Save a little money AND have a lifetime warranty? I thought I wanted at least 1/8 so I could buy heavy ammo and get better distance and knock down. But if it's twice as much or close to it I'll never afford it. Thanx everyone.