This is a great low cost, low profile, micro gas block. Machined from steel but light weight at only 1.6 ounces. Fits under most all extended handguards without interfering with gas flow. .750" size. Black phosphate finish mates well with all factory gun finishes. Secures with two set screws. Includes wrench and roll pin for gas tube. Price is $15.99.
Don't forget to pick up the new gas block aligner. Makes proper positioning and installation of gas block a breeze.