11-25-2013, 02:47 AM
customcutter Wrote:I think the main areas I'm going to concentrate on are the squareness of the upper and the fit of the barrel extension to the upper. I won't be punching paper for that last 1/4". It will be a hunting rifle that I can hopefully get to shoot sub MOA. To start with I'll assemble without bedding the barrel extension and I'll use anti-sieze on the barrel nut. If accuracy isn't there I'll back up and start over.
A very sensible, organized approach. If you know anyone with an upper receiver lapping tool, it may be worth offering a 6-pack for the use of it. Half of my uppers, when checked, were not square (some a little, one a bit more). By lapping them, I at least had the peace of mind that squared receivers were not going to be an issue. Mind you, now, some of mine are bench riders, and others are mud guns. I treat then all the same, though, in case I ever interchange parts.