Thicker walled upper

[A5BLASTER]

Thanks for all the info gentelmen, I have decided to go with the joebobs spartan billet upper as soon as it comes back instock.

I like the looks and lines of it better then most other uppers and the fact that the brass deflect and foward assest is attacthed vie a allen head screw instead of a roll pin like the vltor mur.

And the price just cant be beat 109 on joebobs site and its a billet, so thats the upper im going to give a try.

Again thanks for all the info fellas.