The threads are 1/4"-28 which I couldn't find at Lowes. Others have been able to find them locally. The Boyds will take take a little longer than stock. I used one that was 3/4" in length scew for the factory stock and I had to file it down a little. You could pick up a 3/4" screw and a 1" screw to try. I got mine from boltdepot.com The rear screw I used was 1.5". They were stainless socket cap heads.