Having enjoyed the expertise of a senior General Motors engine designer in the past as well as access to engineers at Boeing has been of great benefit to us in how and why we do certain things.
The explanation is really rather simple. It is nearly impossible to apply even torque to multiple fasteners.
It is easier to get equal and consistant torque on 2 screws than what can be attained on 4 or 6 as are sometimes seen on some makers rings. Many small screws may look cool but in fact this does not only weaken the scope ring but necessitates the use of smaller fasteners.
Most scope ring makers list optimal torque per screw at between 20 and 25 INCH pounds of torque. On a standard 6x48 screw that is commonly used on most scope rings the screws fail at about 40 inch pounds.
The fasteners we employ are .025" larger in diameter and take 80 inch pounds to shear the heads off of. This does not sound like a lot of additional size but keep in mind that not only is the shank diameter larger, but the head diameter is larger as well which allows for a larger area to distribute the torque over.
By employing larger diameter fasteners we can keep the amount of real estate used by the rings on the scope tube to a minimum, thereby allowing more room to move the optic into the ideal position for the shooter's eye relief. This can be really important on a scope like a Schmidt Bender PMII with the illumination option. Putting wide rings on this scope means 1 location only on the rail and that may not be where the shooter requires the scope to be located for optimal eye relief.
Our rings do NOT require lapping at all. Yes they ARE that precise.
The distance between the upper and lower ring halves is .010" so it is virtually impossible to crush a scope tube significantly enough to do damage effecting the scope's operation should a person over torque our rings.
We offer our rings in 30mm tube diameter in low medium and high heights and in 34mm tube diameter in low height.
We offer our rings in a lightweight configuration made of hard anodized 7075 Aircraft grade billet aluminum.
Cross bolts, nuts, screws and side clips are all made of chrome moly steel and nitrided for increased durability and surface hardness.