You got a nice deal. I bought some 40-X's/X-b's from the CMP several years ago. I've been very happy with all of them. Check the serial number etched into the bottom of the bolt to see if it matches that of the rifle...if it doesn't, don't sweat it. The CMP, at times, got the rifles and the bolts in separate shipments with the bolts intermixed but CMP checked the headspace on each one. At least one of mine has a mis-matched bolt but it's a non-problem.
Put a scope on that sucker and see what it'll do..
Last edited by navlav8r; 07/21/17.
