Our in-house one-piece scope base will provide you the benefit of accurate shooting when you need it most. – Features – Precision-machined from 7075 aluminum – Black anodized finish for corrosion resistance and durability – Lightweight at just 2.5 oz – Uses 8-40 screws – Compatibility – Fits all Evoke receivers – Fits long-action Std. Rem 700 receivers that use 8-40 screws – DOES NOT FIT any Christensen Arms rifle except for the Evoke