Features: Nuts Securing Method0 MOA Inclination30mm Ring Diameter0.906" / 23 mm Height to Bottom of Ring1.496" / 38 mm Height to Centerline3.000" / 75 mm Length Inside of Rings4.921" / 125 mm Length to Outside of Rings4.921" / 125 mm Overall Mount Length3.937" / 100 mm Length Between Nuts/LeversWith several new models released by ERA-TAC in 2017, Short-Version One-Piece Mounts are suitable for use with any bolt action or AR10-type rifle. Fully-machined from solid, high-grade aluminumAll parts are Mil-spec, Type-III anodized (black), rendering them corrosion-proofAvailable for 30-, 34-, and 36-mm scope tubesMPN series T10xx secure with safety leversMPN series T20xx secure with nutsAll versions available in 0- and 20-MOA inclination. Available ERA-TAC 30mm One Piece Mounts - With NutMPNCenterline HeightInclinationT2013-00100.98"0 MOAT2013-20100.90"20 MOAT2013-20151.10"20 MOAT2013-00151.18"0 MOAT2013-00201.38"0 MOAT2013-20221.38"20 MOAT2013-00231.50"0 MOAT2013-20251.50"20 MOAT2013-00331.89"0 MOAT2013-20351.89"20 MOAAvailable ERA-TAC 30mm One Piece Mounts - With LeverMPNCenterline HeightInclinationT1013-00231.50"0 MOAT1013-20251.50"20 MOAT1013-00331.89"0 MOAT1013-20351.89"20 MOA ERATAC 30mm 0 MOA 23mm / 0.906" High One-piece Scope Mount T2013-0023