The Jacob Grey Ultra-Lite Titanium Gas Blocks are a simple solution for those looking to save weight on AR-15 style firearms. By utilizing titanium, weight can be reduced as much as 40 percent over standard steel gas blocks. The low profile design works well under hand guards, and anywhere else that space is at a premium. A basic two set screw design ensures a secure fit and easy installation. Blue locking compound is recommended. Made from 6AL-4V titanium, (.750) Low profile design. Includes 2 stainless set screws.