Sylvan Arms AR-15 F/9mm Glock Conversion Block
Easily swap out your 5.56 upper with a 9MM upper using your AR-15 lower receiver with the addition of the Sylvan Arms Glock Magazine conversion Block!
The Sylvan Arms 9mm Glock Conversion Block is a drop-in fit to give you a 9mm capable lower without resorting to buying a pistol caliber specific option. Designed to install in Mil-Spec lowers almost exactly like a standard rifle magazine.
Features of Sylvan Arms AR-15 f/9mm Glock Conversion Block