Rifle Scopes boresighters

[BlkExp98]

I am interested in getting a boresighter mainly for the grid to check scopes out and center them. My question is who makes a good one thats magnetic and has a good grid?

I have looked into the Leupold one and have tried to find the old US Optics one but havent had much luck with it. I also remember the US Optics one being pretty high money wise and had a shorter magnetic base. It did however have a much beter grid than the Leupold. My application will be anythng from .22 rifles to my bolt gun and an AR15. The AR is what i need the height for.

If any of you are selling one or know some good sources please pass the info along.

I know this is an ongoing question but do any of you have any good tips for leveling a reticle in a enclosed space. (read inside the house not counting windows)Ive read about the shim and bubble level methods but there isnt always a good place to level the action.

Thanks,

Major