The mounts are machined from billet 7000 series aluminum and all aluminum parts are hardcoat anodized. The Torx 20 ring and clamping screws are zinc-nickel coated for corrosion resistance and come pre-waxed from the factory to ensure proper torque values. The mount is shipped with a manual and a “wedge” leveling key.
Note: The original SP-4026 was designed for 3-gun competition by The Noveske Shooting Team. The SP-4026C will fit most 34 mm scope tubes except for scopes with extended erector housings, such as the US Optics TPAL/EREK. This mount was designed for use on AR-15 carbines and does not align with back-up iron sights. Due to the low height and extreme cantilever, the SP-4026C does not feature a bubble level as the rest of the ISMS series do.