This part is identical to Ed Brown's Standard Magazine Release, except the button is extended an additional .060 for easier reach and faster magazine changes. Drop-in fit, machined from solid bar stock and heat treated for durability. Beautiful machine cut checkering on button. Does not interfere with tactical style holsters. A positive stop is machined in to prevent over-travel. Fits all single stack 1911 frames. Uses existing magazine catch spring and magazine catch lock, or purchase Ed Brown rebuild kit #814 or #814-S.