The best AR scope mounts I've ever used are American Defense, not cheap, but I think the best there is for your $$$. They have different heights so check they're website for the correct height for you, probably the standard height, although I shoot a little head up so I use the extra high for 1" scopes & standard high for the 30mm. If your shooting a long or very high powered scope you'll want the Recon line.
Jim D