This item was designed by a gentleman named ” fright101″
He gave me the original files which I converted to a larger size and printed out! This guy is a genius! I used the vice block on my AR and removed the barrel in 2 seconds flat! Printing it is another matter because it takes about 6 hours! You will need to file the “fingers” where the blocks connect but that just makes the thing just that much tighter! Please go on ar-15.com and give him a thank-you!
UPDATE! just added separate right and left STL files for smaller printers.