The Sylvan Arms SA5 was designed and tested with professionals and protectors in mind. Turn your AR into a compact, concealable platform with a folding stock adapter built to outlast your rifle. Made in the USA, the SA5 is lightweight and 250% stronger than our 4th gen adapter. Choose from a left folding or right folding option depending on your needs. Built to work and built to last, the SA5 is user-serviceable and easy to install. FeaturesAR15 CompatibleCNC-machined in the USA from 4140 Steel and only 9.4 ouncesRight or Left Fold VersionsAdjustable Hinge TensionImproved and Hardened Buffer Pin2 QD attachment pointsImproved Locking MechanismStandard 1-3/16" x 16 threadingIncludes all tools needed for easy installationIncludes a 1045 Steel Bolt ExtensionNo additional parts are required for standard AR15 Bolt Carrier GroupsInstalls in under 5 minutes. NotesCompatible with Mil-Spec AR15, most AR10 builds.9mm bolt carriers with standard sizing, 5/8 ID (.625) can use the included bolt e...