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KAK Low Profile Gas Block .750 Steel. 750 Dia Low Profile Gas Block. These Gas Blocks Are Machined In House From 4140 Steel Finished With A Blasted Manganese Phosphate Finish.These Are The Same Gas Blocks Used In Our Kak Industry Upper Assemblies Comes Complete With Set Screws And Gas Tube Roll Pin Ready To Install On Your .750 Dia Barrel Very Low Profile To Clear Most Rail Systems.. Specifications for KAK .750 Low Profile Steel Gas Block: Manufacturer: KAK Cartridge: .750 Nitro Express Gun Model: AR-15 Package Contents: KAK .750 Low Profile Steel Gas Block KAK AR15-UP-001: Low Profile Gas Block .750 Steel KAK AR15-UP-001: Low Profile Gas Block .750 Steel