APF Adjustable Gas Block .750 Black. . These AR Gas Blocks through the professional product specialists at APF are designed by using heavy duty and reliable components to be able to supply you with a product that will be powerful for quite some time. Made using some of the very best available materials and construction these AR Gas Blocks from the product professionals at APF will last an incredibly long time. APF has been making top quality merchandise for a very long time and the APF Adjustable Gas Block is their means of showing you exactly how much they are concerned. Here at OpticsPlanet we make it our obligation to purchase the perfect product for your requirements and featuring the APF Adjustable Gas Block is a thing that we're delighted to offer. Specifications for APF Adjustable Gas Block: Manufacturer: APF Color: Black Fabric/Material: Steel Gas Block Journal Size-Diameter: .750 in Caliber: .223 Remington Package Contents: APF Adjustable Gas Block APF RP100263: Adjustable Gas Block .750 Black