Installation InstructionsWritten Instructions and Helpful Links:NEW! AARS Handguard Installation InstructionsMicro & Micro Adjustable Piston Kit Installation InstructionsMicro Adjustable Block Adjustment DiagramPiston Kit Installation InstructionsFAQ PageOwner’s ManualExploded View DiagramGas Length DiagramRail Clearance Diagram Retro-fit piston system Installation Video Slide Assembly Installation Video