I have one of these...Excellent in the box!

http://www.clearidgeoptics.com/product-p/3900.htm

Check it out. Look at the reviews. Did a box test with an accurate 308 and the box was 1/4 inch out of square with first and last shots touching. Great glass. Just no longer need. 375.00 shipped

For we preach not ourselves, but Christ Jesus the Lord, and ourselves your servants for Jesus sake. 2 Corinthians 4:5