1 piece mount is recommended for better ruggedness and better front & back ring alignment.
33+ Best One-Piece Scope Mount Reviews. One piece scope mounts found in: The two are one piece mounts and scope rings.
Vortex Optics Cantilever 1-Piece Extended Scope Mount ... from media.midwayusa.com
Buy sights and scopes mounts and get the best deals at the lowest prices on ebay! In fact these mounts can add height to get the scope into proper and that being said one piece mounts are better for tactical rifles like the ar 15 and bolt action rifles designed as bench shooting weapons. I've used a couple of larue mounts over the years as well (but have generally transitioned away from them).
You'll also want to make sure that whatever mount you go with, it provides the proper eye relief for your particular optic, but that's mostly a function of where you mount the optic.
These mounts can add height to get your scope into proper and comfortable position on your ar15. There are hundreds of different options out there that range. If you find one that's close enough. You'll need some quality scope rings and scope mounts.
