ERA-TAC one-piece mounts from high grade aluminum and hardcoat anodized according to Mil-Spec Class III. Mounts available without angle or angled (20MOA). High repeatability and precision by solid design. Available with 7/16“ nuts or self locking levers. 2“-and 3“ models to be used on AR15 rifles. Mounts without or 2“- extension fit AR10 rifles.