-Positively locks magazine in Gen 1 STI/Staccato grips.
-Prevents over-insertion that could lock up slide.
-Prevents broken or bent ejectors.
-Standard length extends .190" past grip frame.
-Extended length extends .265" past grip frame.
-Comes drilled and tapped for 4-40 or not drilled and tapped.
-CNC machined to exact tolerances and heat treated for durability.