If it is an injected mounded stock cannot be milled out to accept the M5 guard, there is simply not enough material in the stock. If you look inside it is pretty much hollow except for a couple of crucial points. We can’t do Houge overmoulded stocks either. We can do any Fiberglass/Kevlar stocks, Manners, McMillan, Bell & Carlson and HS Precision stocks or any stock of similar design and we can do wood stocks.
Look at it this way, when you zero your rifle at 100 Yards, there is some downward adjustment left in your scope, we refer to this as the bottom of your adjustment.
Any adjustment left in the bottom of your scope is wasted, you will never use it, so by adding Forward cant or angle to the mount you recover some of this adjustment and add it to the top of your adjustment which equals more range.
Originally canted bases or unimounts were used to extend the range of scopes that had a small amount of total adjustment, now most modern scopes have 60 or more MOA.
In the modern scope world it is good to use a canted base to keep the optics as close to center at long range because you will get a clearer cleaner picture when the erector tube in the scope is close to center of the optical path.
The caps are right, If you look closely you will see they are cut above center, this gives the illusion that the cap is smaller but if you set your scope in the bottom and stick the cap on top you will see they fit perfectly.
We do this because rings cut at the 3-9 o'clock on center, have a tendency to pinch the scope. If they are over tightened or if the rifle is dropped and the ring top hits something or something hits it, this can cause the rings to pinch the scope and leave permanent damage.