Armalite Scope Mnt (For M-15, Ar-10, 50B & Ar-30)- 30 Mm ArmaLite's scope mounts provide out-standing repeatable engagement w/MILSTD 1913 (Picatinny) rail used on all modern AR's, while placing the scope centerline at the same positions the iron sights of the M15A2 rifle... you use the same stock weld with the