Forward Controls Design Adjustable Turret Cap for Aimpoint Micro Series Sights - T1 and T2 Black ATA T1/T2. ATA includes two caps and two discs that allow windage and elevation adjustments without having to remove the caps. This turret cap pair is machined from 17-4 SS with 17-4 SS rotating discs and includes O-rings. Note: These turret caps are not compatible with the Comp M5. Specifications for Forward Controls Design Adjustable Turret Cap for Aimpoint Micro Series Sights - T1 and T2: Manufacturer: Forward Controls Design Color: Black Finish: Nitride Fabric/Material: 17-4 Stainless Steel Red Dot Sights-Footprint: Aim Point Micro Package Contents: Forward Controls Design Adjustable Turret Cap for Aimpoint Micro Series Sights - T1 and T2 2x caps 2x discs Forward Controls Design ATA T1/T2: Adjustable Turret Cap for Aimpoint Micro Series Sights - T1 and T2 Black