The Millet Turn-In Two Piece Lightweight Riflescope Bases TURNIN2PC are designed to be a strong and durable way to attach your riflescope to your firearm. This Millet Riflescope Base Mounting System provides maximum ejection port clearance, so your weapon will function at it's highest capacity. The Millet Turn-In Riflescope Base Kit weighs 30%-50% less than traditional bases.