I put a cheek pad on the stock and is fine, quick sighting when rifle is raised and very good eye relief with that mount. I also tried the ARMS18 and TA51 mount but it hindered shell ejection. With the TA70 mount, the TA51 is not needed thus reducing height ( TA11E mounts directly on pre drilled mounting holes) and rail extends back to the rear sight. I just put 100 rds through it yesterday and worked perfectly. If the picture showed the whole rifle you would see its height is in line with others I was going to try the CASM mount but height was the same and I didn't want to disassemble the rear sight and mounting was not as secure. The ACOG speaks for itself.