i recently purchased a model 11fcxp, i bought it as a combo but knew the scope on it was junk, so i purchased a vortex scope and leupold base and rings, the base said (std. fits model 10-16) when i got all the parts i went to put them on but could not get no where near enough moa out of the scope to even bring it up on the boresighter, the only thing i can think of is the base is for some reason wrong, what else could it be?, also i have decided to put pictianny mounts on it since a std. didnt work but i got on murphys precision and it said model 11 acutrigger models only what is the differance and why cant i get anything aftermarket to work on this gun? thanks for all the help.