Dual Ball Bearing Pivot Point (using ultra smooth high quality bearings) Ultra light weight design Ergonomically correct design Integrated adjustable reverse polarity magnetic return Rounded and smooth edges (fully radiused) Super smooth and very. very fast Fits the Dye Matrix DM8 / DM7 / DM6 and DM5/DM4 and now the Proto PM6 / PM7 Ultralight Frames (does not fit the PMR Rail UL Frame) Four way adjustable trigger. magnet tension. switch activation point via the unique Critical Lever System. rear travel stop. and trigger angle