Manticore Arms Hellion Enhanced Bolt Release Black. Made from 6061 aluminum with a milspec black anodizing it has twice the height and twice the surface area of the OEM part to give you positive operation and also protect the magazine release from accidental operation. Specifications for Manticore Arms Hellion Enhanced Bolt Release: Manufacturer: Manticore Arms Gun Type: Rifle Gun Make: Springfield Armory Gun Model: Springfield Armory Hellion Fabric/Material: 6061 Aluminum Color: Black Weight: 3 lb Features of Manticore Arms Hellion Enhanced Bolt Release Twice the height and surface area of OEM bolt release Package Contents: Manticore Arms Hellion Enhanced Bolt Release What firearm models does the manufacturer say Manticore Arms Hellion Enhanced Bolt Release is compatible with? The manufacturer suggests that Manticore Arms Hellion Enhanced Bolt Release is compatible with Springfield Armory HellionManticore Arms MA-38100: Hellion Enhanced Bolt Release Black