The Aero Precision Ultralight 1" SPR Scope Mount offers a cantilever style scope mount with the rings pushed 2" forward for large scopes and results in improved eye relief. In addition to being a scope mount that accommodates high power scopes mounted on an AR-15 1913 Picatinny rail, this Aero mount features a cross-slotted keyway which offers outstanding recoil protection. As the "Ultralight" name indicates, these mounts are some of the lightest on the market. MADE IN AMERICAYesFINISHAnodized BlackMATERIAL6061 T6 extruded aluminum constructionSCOPE RING SIZE1"SCOPE MOUNT PROFILESPRWEIGHT(S)3.2 ozOTHER FEATURESDesigned for AR type upper receiversScrew Torque - 15 in-lbs