My chrome barrel had a 2.40 (aprox) length to lands and grooves. The new 18" SS barrel measures 2.816 to the L&G's. The Kac mag has a usable ID of 2.832. This means I could actually get my bullets .002 away from the l&g's if I wanted to. This is the first semi-auto I have owned that had a chamber tighter than the mag.
Just an FYI for those buying the SS barrel.
Just an FYI for those buying the SS barrel.