The Smith & Alexander magwell is one of the most practical and usually the first custom part one installs on their 1911 pistol. The S&A magwell is a drop-in, one-piece magwell and mainspring housing that can be installed with ease in minutes with no frame modifications. The S&A Mag Guide increases the magazine opening over 100%. Once installed on the frame it fits solid. No welding required. Adds 1/4" to grip for extra leverage and recoil control.